feat: Implement the main game scene with manager initialization, comprehensive UI setup including a dynamic message bar, tile respawn logic, and core multiplayer integration.

assets/shaders/tilt2_shader.gdshader

@@ -0,0 +1,26 @@
+shader_type canvas_item;
+
+// Positive values lean right, negative lean left
+uniform float skew_x : hint_range(-2.0, 2.0) = 0.0;
+// Positive values lean down, negative lean up
+uniform float skew_y : hint_range(-2.0, 2.0) = 0.0;
+
+void vertex() {
+	// 1. Get the size of the Control node
+	vec2 size = 1.0 / TEXTURE_PIXEL_SIZE;
+	
+	// 2. Move the pivot to the center for a natural tilt
+	// Without this, it skews from the top-left corner
+	VERTEX -= size * 0.5;
+	
+	// 3. Apply the Skew math
+	// We use a temporary variable so the calculations don't interfere
+	float old_x = VERTEX.x;
+	float old_y = VERTEX.y;
+	
+	VERTEX.x = old_x + (old_y * skew_x);
+	VERTEX.y = old_y + (old_x * skew_y);
+	
+	// 4. Move back from the center
+	VERTEX += size * 0.5;
+}