Update stuff

GameLogic/GameManager.cs

@@ -137,7 +137,7 @@ public partial class GameManager : Node
       foreach (var character in playerCharacters)
          character.GetParent().RemoveChild(character);
 
-      var projectiles = GetTree().Root.GetChildren().OfType<Projectile>();
+      var projectiles = GetTree().GetNodesInGroup("Projectile").Where(x => !x.IsQueuedForDeletion());
       foreach (var projectile in projectiles)
          projectile.QueueFree();