diff --git a/Audio/BGM/Foothpath.mp3 b/Audio/BGM/Foothpath.mp3
new file mode 100644
index 0000000..d8e5ec5
Binary files /dev/null and b/Audio/BGM/Foothpath.mp3 differ
diff --git a/Audio/BGM/Foothpath.mp3.import b/Audio/BGM/Foothpath.mp3.import
new file mode 100644
index 0000000..d0b2973
--- /dev/null
+++ b/Audio/BGM/Foothpath.mp3.import
@@ -0,0 +1,19 @@
+[remap]
+
+importer="mp3"
+type="AudioStreamMP3"
+uid="uid://dgumak5rfufcr"
+path="res://.godot/imported/Foothpath.mp3-f79ae66898319ed316e084d31be1f8ed.mp3str"
+
+[deps]
+
+source_file="res://Audio/BGM/Foothpath.mp3"
+dest_files=["res://.godot/imported/Foothpath.mp3-f79ae66898319ed316e084d31be1f8ed.mp3str"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4
diff --git a/Audio/BGM/SeasidePalace.mp3 b/Audio/BGM/SeasidePalace.mp3
new file mode 100644
index 0000000..de687aa
Binary files /dev/null and b/Audio/BGM/SeasidePalace.mp3 differ
diff --git a/Audio/BGM/SeasidePalace.mp3.import b/Audio/BGM/SeasidePalace.mp3.import
new file mode 100644
index 0000000..0faa063
--- /dev/null
+++ b/Audio/BGM/SeasidePalace.mp3.import
@@ -0,0 +1,19 @@
+[remap]
+
+importer="mp3"
+type="AudioStreamMP3"
+uid="uid://c22yq0xgr51ns"
+path="res://.godot/imported/SeasidePalace.mp3-031c623616760663bd8d42dd0ed69671.mp3str"
+
+[deps]
+
+source_file="res://Audio/BGM/SeasidePalace.mp3"
+dest_files=["res://.godot/imported/SeasidePalace.mp3-031c623616760663bd8d42dd0ed69671.mp3str"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4
diff --git a/Audio/SFX/gunshot.mp3 b/Audio/SFX/gunshot.mp3
new file mode 100644
index 0000000..9893129
Binary files /dev/null and b/Audio/SFX/gunshot.mp3 differ
diff --git a/Audio/SFX/gunshot.mp3.import b/Audio/SFX/gunshot.mp3.import
new file mode 100644
index 0000000..066aebb
--- /dev/null
+++ b/Audio/SFX/gunshot.mp3.import
@@ -0,0 +1,19 @@
+[remap]
+
+importer="mp3"
+type="AudioStreamMP3"
+uid="uid://cupjwk5q538g2"
+path="res://.godot/imported/gunshot.mp3-5c8edc7db5b7f086bcc103a3b02e3ddc.mp3str"
+
+[deps]
+
+source_file="res://Audio/SFX/gunshot.mp3"
+dest_files=["res://.godot/imported/gunshot.mp3-5c8edc7db5b7f086bcc103a3b02e3ddc.mp3str"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4
diff --git a/Scenes/Gun.tscn b/Scenes/Gun.tscn
index a59cf75..ef8ad33 100644
--- a/Scenes/Gun.tscn
+++ b/Scenes/Gun.tscn
@@ -38,6 +38,7 @@ size = Vector2i(1152, 648)
 render_target_update_mode = 4
 
 [node name="Camera3D" type="Camera3D" parent="SubViewportContainer/SubViewport"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -38809.9, 0)
 cull_mask = 1047554
 environment = ExtResource("1_3jquc")
 
diff --git a/Scenes/Healthbar.cs b/Scenes/Healthbar.cs
deleted file mode 100644
index 50cf6a1..0000000
--- a/Scenes/Healthbar.cs
+++ /dev/null
@@ -1,8 +0,0 @@
-using Godot;
-
-public partial class Healthbar : Sprite3D
-{
-  public override void _Ready()
-  {
-  }
-}
diff --git a/Scenes/Level.tscn b/Scenes/Level.tscn
index 6b396ea..b342e85 100644
--- a/Scenes/Level.tscn
+++ b/Scenes/Level.tscn
@@ -1,20 +1,31 @@
-[gd_scene load_steps=7 format=3 uid="uid://ocor7udqvoec"]
+[gd_scene load_steps=9 format=3 uid="uid://ocor7udqvoec"]
 
-[ext_resource type="PackedScene" uid="uid://bi7j4afsxghrj" path="res://Scenes/Player.tscn" id="1_my8b5"]
-[ext_resource type="PackedScene" uid="uid://cc5emorildoar" path="res://Scenes/Gun.tscn" id="2_mhg71"]
+[ext_resource type="Script" path="res://Scripts/Level1.cs" id="1_gvb28"]
 [ext_resource type="PackedScene" uid="uid://b03tplah8y1do" path="res://Scenes/target.tscn" id="3_civmh"]
 
 [sub_resource type="BoxShape3D" id="BoxShape3D_gyf0l"]
-size = Vector3(20, 0.5, 20)
+size = Vector3(10, 0.5, 20)
 
-[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_78bnu"]
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_vca8v"]
 albedo_color = Color(0, 0, 0, 1)
 
 [sub_resource type="BoxMesh" id="BoxMesh_v2sg1"]
-material = SubResource("StandardMaterial3D_78bnu")
-size = Vector3(20, 0.5, 20)
+material = SubResource("StandardMaterial3D_vca8v")
+size = Vector3(10, 0.5, 20)
 
-[node name="Level" type="Node3D"]
+[sub_resource type="BoxShape3D" id="BoxShape3D_ql8hs"]
+size = Vector3(10, 5, 1)
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_po5cl"]
+albedo_color = Color(0.219608, 1, 1, 1)
+
+[sub_resource type="BoxMesh" id="BoxMesh_6wms0"]
+material = SubResource("StandardMaterial3D_po5cl")
+size = Vector3(10, 5, 1)
+
+[node name="Level" type="Node3D" node_paths=PackedStringArray("_spawnPoint")]
+script = ExtResource("1_gvb28")
+_spawnPoint = NodePath("Spawn Point")
 
 [node name="StaticBody3D" type="StaticBody3D" parent="."]
 collision_mask = 0
@@ -26,13 +37,24 @@ shape = SubResource("BoxShape3D_gyf0l")
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.189965, 0)
 mesh = SubResource("BoxMesh_v2sg1")
 
-[node name="Player" parent="." instance=ExtResource("1_my8b5")]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.269294, 0)
-
-[node name="Gun" parent="Player" instance=ExtResource("2_mhg71")]
-transform = Transform3D(0.979575, 0, 0.201078, 0, 1, 0, -0.201078, 0, 0.979575, 0.074702, 1.59908, -0.498807)
-
 [node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
 transform = Transform3D(-0.0510635, -0.435165, -0.898901, 0, -0.900076, 0.435734, -0.998695, 0.0222501, 0.045961, -5.60126, 7.19548, 0)
 
 [node name="Target" parent="." instance=ExtResource("3_civmh")]
+
+[node name="Area3D" type="Area3D" parent="."]
+collision_layer = 0
+collision_mask = 4
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="Area3D"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 2.54778, -7.99117)
+shape = SubResource("BoxShape3D_ql8hs")
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="Area3D"]
+transform = Transform3D(1, 0, 0, 0, 1, 0.000349066, 0, -0.000349066, 1, 0, 2.52005, -7.98064)
+mesh = SubResource("BoxMesh_6wms0")
+
+[node name="Spawn Point" type="Marker3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.712399, 7.37212)
+
+[connection signal="body_entered" from="Area3D" to="." method="OnCollisionWithLevelLoader"]
diff --git a/Scenes/Main.tscn b/Scenes/Main.tscn
new file mode 100644
index 0000000..c9a9e69
--- /dev/null
+++ b/Scenes/Main.tscn
@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=3 uid="uid://dc34fjiv2tppx"]
+
+[ext_resource type="Script" path="res://Scripts/Main.cs" id="1_n48r1"]
+
+[node name="Main" type="Node"]
+script = ExtResource("1_n48r1")
diff --git a/Scenes/MainMenu.tscn b/Scenes/MainMenu.tscn
new file mode 100644
index 0000000..39d630f
--- /dev/null
+++ b/Scenes/MainMenu.tscn
@@ -0,0 +1,17 @@
+[gd_scene load_steps=2 format=3 uid="uid://dri1iuiavxf24"]
+
+[ext_resource type="Script" path="res://Scripts/MainMenu.cs" id="1_gt0q4"]
+
+[node name="MainMenu" type="Node2D"]
+
+[node name="Node2D" type="Node2D" parent="."]
+script = ExtResource("1_gt0q4")
+
+[node name="Button" type="Button" parent="Node2D"]
+offset_left = 310.0
+offset_top = 251.0
+offset_right = 835.0
+offset_bottom = 386.0
+text = "Start"
+
+[connection signal="pressed" from="Node2D/Button" to="Node2D" method="StartButtonPressed"]
diff --git a/Scenes/Player.tscn b/Scenes/Player.tscn
index 65dd166..4bbaa86 100644
--- a/Scenes/Player.tscn
+++ b/Scenes/Player.tscn
@@ -1,14 +1,25 @@
-[gd_scene load_steps=5 format=3 uid="uid://bi7j4afsxghrj"]
+[gd_scene load_steps=10 format=3 uid="uid://dae1bs2yqqt5l"]
 
 [ext_resource type="Script" path="res://Scripts/Player.cs" id="1_jsq3s"]
 [ext_resource type="Environment" uid="uid://c1i78mwq3ug2f" path="res://Scenes/Enivornment.tres" id="2_t03qe"]
+[ext_resource type="AudioStream" uid="uid://cupjwk5q538g2" path="res://Audio/SFX/gunshot.mp3" id="3_5mglu"]
+[ext_resource type="Script" path="res://Scripts/SoundEffects.cs" id="4_fmvkw"]
+[ext_resource type="PackedScene" uid="uid://cc5emorildoar" path="res://Scenes/Gun.tscn" id="5_sb1dv"]
+[ext_resource type="Script" path="res://Scripts/PlayerHUD.cs" id="6_pawgr"]
 
 [sub_resource type="CapsuleShape3D" id="CapsuleShape3D_cxbex"]
 
 [sub_resource type="CapsuleMesh" id="CapsuleMesh_7dxig"]
 
+[sub_resource type="LabelSettings" id="LabelSettings_3d4s1"]
+font_size = 40
+font_color = Color(0.490196, 0.403922, 0.278431, 1)
+outline_size = 3
+outline_color = Color(0, 0, 0, 1)
+
 [node name="Player" type="CharacterBody3D" node_paths=PackedStringArray("_pivot")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.13331, 0)
+collision_layer = 5
 script = ExtResource("1_jsq3s")
 _mouseSensitivity = 0.07
 _pivot = NodePath("Pivot")
@@ -28,7 +39,40 @@ fov = 60.0
 transform = Transform3D(0.125, 0, 0, 0, 0.125, 0, 0, 0, 0.125, 0, 0, 0)
 target_position = Vector3(0, 0, -1000)
 
+[node name="AudioStreamPlayer3D" type="AudioStreamPlayer3D" parent="Pivot/Camera3D"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -1.10748, -0.0718701)
+stream = ExtResource("3_5mglu")
+volume_db = -28.0
+max_db = -5.0
+max_polyphony = 8
+script = ExtResource("4_fmvkw")
+
 [node name="MeshInstance3D" type="MeshInstance3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0)
 visible = false
 mesh = SubResource("CapsuleMesh_7dxig")
+
+[node name="Gun" parent="." instance=ExtResource("5_sb1dv")]
+
+[node name="CanvasLayer" type="CanvasLayer" parent="."]
+script = ExtResource("6_pawgr")
+
+[node name="AmmoLabel" type="Label" parent="CanvasLayer"]
+anchors_preset = 3
+anchor_left = 1.0
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_left = -149.0
+offset_top = -63.0
+grow_horizontal = 0
+grow_vertical = 0
+size_flags_horizontal = 8
+size_flags_vertical = 8
+text = "Ammo"
+label_settings = SubResource("LabelSettings_3d4s1")
+horizontal_alignment = 1
+vertical_alignment = 1
+
+[connection signal="FireGun" from="." to="Pivot/Camera3D/AudioStreamPlayer3D" method="OnFireGun"]
+[connection signal="FireGun" from="." to="CanvasLayer" method="OnFireGun"]
diff --git a/Scenes/level_2.tscn b/Scenes/level_2.tscn
new file mode 100644
index 0000000..816ba6f
--- /dev/null
+++ b/Scenes/level_2.tscn
@@ -0,0 +1,57 @@
+[gd_scene load_steps=8 format=3 uid="uid://bkuyttbckhl3"]
+
+[ext_resource type="Script" path="res://Scripts/Level2.cs" id="1_baeon"]
+
+[sub_resource type="BoxShape3D" id="BoxShape3D_ggo5h"]
+size = Vector3(10, 0.5, 20)
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_78bnu"]
+albedo_color = Color(0, 0, 0, 1)
+
+[sub_resource type="BoxMesh" id="BoxMesh_oq36m"]
+material = SubResource("StandardMaterial3D_78bnu")
+size = Vector3(10, 0.5, 20)
+
+[sub_resource type="BoxShape3D" id="BoxShape3D_b5rn0"]
+size = Vector3(10, 5, 1)
+
+[sub_resource type="StandardMaterial3D" id="StandardMaterial3D_kfppx"]
+albedo_color = Color(1, 0.494118, 1, 1)
+
+[sub_resource type="BoxMesh" id="BoxMesh_0mdec"]
+material = SubResource("StandardMaterial3D_kfppx")
+size = Vector3(10, 5, 1)
+
+[node name="Level2" type="Node3D" node_paths=PackedStringArray("_spawnPoint")]
+script = ExtResource("1_baeon")
+_spawnPoint = NodePath("Spawn Point")
+
+[node name="StaticBody3D" type="StaticBody3D" parent="."]
+collision_mask = 0
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="StaticBody3D"]
+shape = SubResource("BoxShape3D_ggo5h")
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="StaticBody3D"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, -0.189965, 0)
+mesh = SubResource("BoxMesh_oq36m")
+
+[node name="DirectionalLight3D" type="DirectionalLight3D" parent="."]
+transform = Transform3D(-0.0510635, -0.435165, -0.898901, 0, -0.900076, 0.435734, -0.998695, 0.0222501, 0.045961, -5.60126, 7.19548, 0)
+
+[node name="Area3D" type="Area3D" parent="."]
+collision_layer = 0
+collision_mask = 4
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="Area3D"]
+transform = Transform3D(-0.000924988, 0, 1, 0, 1, 0, -1, 0, -0.000924988, -5.22508, 2.54778, 3.19473)
+shape = SubResource("BoxShape3D_b5rn0")
+
+[node name="MeshInstance3D" type="MeshInstance3D" parent="Area3D"]
+transform = Transform3D(-0.000924988, -0.000349066, 1, 0, 1, 0.000349066, -1, 3.22882e-07, -0.000924988, -5.21455, 2.52005, 3.19472)
+mesh = SubResource("BoxMesh_0mdec")
+
+[node name="Spawn Point" type="Marker3D" parent="."]
+transform = Transform3D(-0.999587, 0, -0.0287242, 0, 1, 0, 0.0287242, 0, -0.999587, 0, 0.712399, -3.24364)
+
+[connection signal="body_entered" from="Area3D" to="." method="OnCollisionWithLevelLoader"]
diff --git a/Scenes/target.tscn b/Scenes/target.tscn
index b1c23c1..081e3b3 100644
--- a/Scenes/target.tscn
+++ b/Scenes/target.tscn
@@ -1,6 +1,9 @@
-[gd_scene load_steps=5 format=3 uid="uid://b03tplah8y1do"]
+[gd_scene load_steps=8 format=3 uid="uid://b03tplah8y1do"]
 
 [ext_resource type="Script" path="res://Scripts/Target.cs" id="1_ykgyh"]
+[ext_resource type="Texture2D" uid="uid://dhcfanxewk34" path="res://Textures/Healthbar/barHorizontal_green_mid 200.png" id="2_66yfs"]
+[ext_resource type="Script" path="res://Scripts/Healthbar.cs" id="3_svfp2"]
+[ext_resource type="Script" path="res://Scripts/HealthbarProgress.cs" id="4_hb8qi"]
 
 [sub_resource type="BoxShape3D" id="BoxShape3D_37aka"]
 
@@ -12,7 +15,7 @@ material = SubResource("StandardMaterial3D_8nuxw")
 
 [node name="Target" type="StaticBody3D" node_paths=PackedStringArray("_progressBar")]
 script = ExtResource("1_ykgyh")
-_progressBar = NodePath("ProgressBar")
+_progressBar = NodePath("Sprite3D")
 
 [node name="CollisionShape3D" type="CollisionShape3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 2.12414, -3.96702)
@@ -23,11 +26,20 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 2.12414, -3.96702)
 mesh = SubResource("BoxMesh_ni5do")
 skeleton = NodePath("")
 
-[node name="ProgressBar" type="ProgressBar" parent="."]
-offset_left = 460.0
-offset_top = 3.0
-offset_right = 688.0
-offset_bottom = 58.0
-value = 100.0
-
 [node name="Sprite3D" type="Sprite3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.0327015, 3.01463, -3.79129)
+billboard = 1
+texture = ExtResource("2_66yfs")
+script = ExtResource("3_svfp2")
+
+[node name="SubViewport" type="SubViewport" parent="Sprite3D"]
+disable_3d = true
+transparent_bg = true
+size = Vector2i(200, 26)
+size_2d_override_stretch = true
+
+[node name="TextureProgressBar" type="TextureProgressBar" parent="Sprite3D/SubViewport"]
+offset_right = 40.0
+offset_bottom = 40.0
+texture_progress = ExtResource("2_66yfs")
+script = ExtResource("4_hb8qi")
diff --git a/Scripts/BGMPlayer.cs b/Scripts/BGMPlayer.cs
new file mode 100644
index 0000000..1b56c79
--- /dev/null
+++ b/Scripts/BGMPlayer.cs
@@ -0,0 +1,17 @@
+using Godot;
+
+public partial class BGMPlayer : AudioStreamPlayer
+{
+  public void SetBGMFromFilepath(string path)
+  {
+    var audioStream = ResourceLoader.Load<AudioStream>(path);
+    if (Stream != audioStream)
+      Stream = audioStream;
+  }
+
+  public void PlayBGM()
+  {
+    if (!Playing)
+      Play();
+  }
+}
diff --git a/Scripts/Healthbar.cs b/Scripts/Healthbar.cs
new file mode 100644
index 0000000..fb38a7d
--- /dev/null
+++ b/Scripts/Healthbar.cs
@@ -0,0 +1,16 @@
+using System.Linq;
+using Godot;
+
+public partial class Healthbar : Sprite3D
+{
+  public override void _Ready()
+  {
+    Texture = GetChildren().OfType<SubViewport>().Single().GetTexture();
+  }
+
+  public void Update(int amount, int full)
+  {
+    var progressBar = GetChildren().ElementAt(0).GetChildren().OfType<HealthbarProgress>().Single();
+    progressBar.UpdateBar(amount, full);
+  }
+}
diff --git a/Scripts/HealthbarProgress.cs b/Scripts/HealthbarProgress.cs
new file mode 100644
index 0000000..82b5af5
--- /dev/null
+++ b/Scripts/HealthbarProgress.cs
@@ -0,0 +1,9 @@
+using Godot;
+
+public partial class HealthbarProgress : TextureProgressBar
+{
+  public void UpdateBar(int amount, int full)
+  {
+    Value = amount;
+  }
+}
diff --git a/Scripts/Level1.cs b/Scripts/Level1.cs
new file mode 100644
index 0000000..32271bb
--- /dev/null
+++ b/Scripts/Level1.cs
@@ -0,0 +1,25 @@
+using System.Linq;
+using Godot;
+
+public partial class Level1 : Node3D
+{
+  [Export]
+  private Marker3D _spawnPoint;
+
+  public override void _Ready()
+  {
+    var player = GetTree().Root.GetChildren().OfType<CharacterBody3D>().Single();
+    player.Transform = _spawnPoint.Transform;
+    var bgmPlayer = GetNode<BGMPlayer>("/root/BgmPlayer");
+    GD.Print(bgmPlayer);
+    bgmPlayer.SetBGMFromFilepath("res://Audio/BGM/Foothpath.mp3");
+    bgmPlayer.PlayBGM();
+  }
+
+  public void OnCollisionWithLevelLoader(Node3D node)
+  {
+    GD.Print("Entered level loader");
+    var sceneHandler = GetNode<SceneHandler>("/root/SceneHandler");
+    sceneHandler.OnLoadScene("res://Scenes/level_2.tscn");
+  }
+}
diff --git a/Scripts/Level2.cs b/Scripts/Level2.cs
new file mode 100644
index 0000000..7bf722e
--- /dev/null
+++ b/Scripts/Level2.cs
@@ -0,0 +1,25 @@
+using System.Linq;
+using Godot;
+
+public partial class Level2 : Node3D
+{
+  [Export]
+  private Marker3D _spawnPoint;
+
+  public override void _Ready()
+  {
+    var player = GetTree().Root.GetChildren().OfType<CharacterBody3D>().Single();
+    player.Transform = _spawnPoint.Transform;
+    var bgmPlayer = GetNode<BGMPlayer>("/root/BgmPlayer");
+    GD.Print(bgmPlayer);
+    bgmPlayer.SetBGMFromFilepath("res://Audio/BGM/SeasidePalace.mp3");
+    bgmPlayer.PlayBGM();
+  }
+
+  public void OnCollisionWithLevelLoader(Node3D node)
+  {
+    GD.Print("Entered level loader");
+    var sceneHandler = (SceneHandler)GetNode("/root/SceneHandler");
+    sceneHandler.OnLoadScene("res://Scenes/Level.tscn");
+  }
+}
diff --git a/Scripts/Main.cs b/Scripts/Main.cs
new file mode 100644
index 0000000..0ec9f1b
--- /dev/null
+++ b/Scripts/Main.cs
@@ -0,0 +1,11 @@
+using Godot;
+
+public partial class Main : Node
+{
+  // Called when the node enters the scene tree for the first time.
+  public override void _Ready()
+  {
+    var mainMenuScene = ResourceLoader.Load<PackedScene>("res://Scenes/MainMenu.tscn").Instantiate();
+    AddChild(mainMenuScene);
+  }
+}
diff --git a/Scripts/MainMenu.cs b/Scripts/MainMenu.cs
new file mode 100644
index 0000000..23c354a
--- /dev/null
+++ b/Scripts/MainMenu.cs
@@ -0,0 +1,12 @@
+using Godot;
+
+public partial class MainMenu : Node2D
+{
+  public void StartButtonPressed()
+  {
+    var sceneHandler = (SceneHandler)GetNode("/root/SceneHandler");
+    sceneHandler.OnLoadScene("res://Scenes/Level.tscn");
+    var player = ResourceLoader.Load<PackedScene>("res://Scenes/Player.tscn").Instantiate();
+    GetTree().Root.AddChild(player);
+  }
+}
diff --git a/Scripts/Player.cs b/Scripts/Player.cs
index 0d8fcf4..50cf452 100644
--- a/Scripts/Player.cs
+++ b/Scripts/Player.cs
@@ -4,6 +4,8 @@ public partial class Player : CharacterBody3D
 {
   [Signal]
   public delegate void OnHitEventHandler();
+  [Signal]
+  public delegate void FireGunEventHandler();
 
   public const float _speed = 5.0f;
   public const float _jumpVelocity = 4.5f;
@@ -63,10 +65,13 @@ public partial class Player : CharacterBody3D
       _pivot.Rotation = new Vector3(Mathf.Clamp(_pivot.Rotation.X, Mathf.DegToRad(-80), Mathf.DegToRad(80)), _pivot.Rotation.Y, _pivot.Rotation.Z);
     }
 
+    if (@event.IsActionPressed("fire"))
+      EmitSignal(SignalName.FireGun);
+
     if (@event.IsActionPressed("fire") && _aimCast.IsColliding())
     {
       EmitSignal(SignalName.OnHit);
-      _aimCast.GetCollider().Call("OnHitEvent", 3);
+      _aimCast.GetCollider().Call("OnHitEvent", 10);
     }
   }
 
diff --git a/Scripts/PlayerHUD.cs b/Scripts/PlayerHUD.cs
new file mode 100644
index 0000000..fd20037
--- /dev/null
+++ b/Scripts/PlayerHUD.cs
@@ -0,0 +1,18 @@
+using System.Linq;
+using Godot;
+
+public partial class PlayerHUD : CanvasLayer
+{
+  private int _currentAmmo = 30;
+  public override void _Ready()
+  {
+    var ammoLabel = GetChildren().Single(x => x.Name == "AmmoLabel") as Label;
+    ammoLabel.Text = $"{_currentAmmo}/30";
+  }
+
+  public void OnFireGun()
+  {
+    var ammoLabel = GetChildren().Single(x => x.Name == "AmmoLabel") as Label;
+    ammoLabel.Text = $"{--_currentAmmo}/30";
+  }
+}
diff --git a/Scripts/SceneHandler.cs b/Scripts/SceneHandler.cs
new file mode 100644
index 0000000..5aba671
--- /dev/null
+++ b/Scripts/SceneHandler.cs
@@ -0,0 +1,31 @@
+using Godot;
+
+public partial class SceneHandler : Node
+{
+  private Node _root;
+
+  // Called when the node enters the scene tree for the first time.
+  public override void _Ready()
+  {
+    _root = GetTree().Root.GetChild(GetChildCount() - 1);
+    GD.Print(_root.GetChildren());
+  }
+
+  public void OnLoadScene(string path)
+  {
+    CallDeferred(nameof(DeferredGoToScene), path);
+  }
+
+  private void DeferredGoToScene(string path)
+  {
+    var currentScene = _root.GetChild(_root.GetChildCount() - 1);
+
+    var nextScene = (PackedScene)GD.Load(path);
+
+    _root.RemoveChild(currentScene);
+
+    currentScene = nextScene.Instantiate();
+
+    _root.AddChild(currentScene);
+  }
+}
diff --git a/Scripts/SoundEffects.cs b/Scripts/SoundEffects.cs
new file mode 100644
index 0000000..5658649
--- /dev/null
+++ b/Scripts/SoundEffects.cs
@@ -0,0 +1,9 @@
+using Godot;
+
+public partial class SoundEffects : AudioStreamPlayer3D
+{
+  public void OnFireGun()
+  {
+    Play();
+  }
+}
diff --git a/Scripts/Target.cs b/Scripts/Target.cs
index 3b3b12e..f78b3e7 100644
--- a/Scripts/Target.cs
+++ b/Scripts/Target.cs
@@ -7,7 +7,7 @@ public partial class Target : StaticBody3D
   private int _currentHP;
 
   [Export]
-  private ProgressBar _progressBar;
+  private Healthbar _progressBar;
 
   public override void _Ready()
   {
@@ -18,7 +18,7 @@ public partial class Target : StaticBody3D
   {
     _currentHP -= damage;
     GD.Print($"Current HP: {_currentHP}");
-    _progressBar.Value = _currentHP;
+    _progressBar.Update(_currentHP, _maxHP);
 
     if (_currentHP <= 0)
       QueueFree();
diff --git a/project.godot b/project.godot
index 640ec09..e3e20d7 100644
--- a/project.godot
+++ b/project.godot
@@ -11,9 +11,14 @@ config_version=5
 [application]
 
 config/name="FPS"
-run/main_scene="res://Scenes/Level.tscn"
+run/main_scene="res://Scenes/Main.tscn"
 config/features=PackedStringArray("4.1", "C#", "Forward Plus")
 
+[autoload]
+
+SceneHandler="*res://Scripts/SceneHandler.cs"
+BgmPlayer="*res://Scripts/BGMPlayer.cs"
+
 [dotnet]
 
 project/assembly_name="FPS"