Added the game scene

There are no berries yet and the bird floats if the screen size isnt
1920 by 1080 but I am still making good progress

Scripts/SceneSwitcher.cs

@@ -0,0 +1,23 @@
+using Godot;
+
+public partial class SceneSwitcher : Button {
+    [Export]
+    public string ScenePath = ""; // Set this in the Inspector
+
+    public override void _Ready() {
+        Pressed += OnButtonPressed;
+    }
+
+    private void OnButtonPressed() {
+        if (string.IsNullOrEmpty(ScenePath)) {
+            GD.PrintErr("Scene path not set!");
+            return;
+        }
+
+        var error = GetTree().ChangeSceneToFile(ScenePath);
+
+        if (error != Error.Ok) {
+            GD.PrintErr("Failed to change scene: " + error);
+        }
+    }
+}