Fix input duplication

Scripts/Player.cs

@@ -34,17 +34,17 @@ public partial class Player : CharacterBody3D
       _weaponType = _projectiles.First();
    }
 
-   public override void _UnhandledInput(InputEvent @event)
-   {
+  public override void _Process(double delta)
+  {
       if (Input.IsActionJustPressed("quit"))
          GetTree().Quit();
       if (Input.IsActionJustPressed("shoot"))
          Shoot();
       if (Input.IsActionJustPressed("switch"))
          SwitchWeaponType();
-   }
+  }
 
-   public override void _PhysicsProcess(double delta)
+  public override void _PhysicsProcess(double delta)
    {
       var gravityDelta = _gravity * (float)delta;
       var velocity = CalculateMovement(Velocity, Transform, gravityDelta);