Moved godot files into a directory to keep things clean

project/terrain/terrain.gd

@@ -0,0 +1,9 @@
+extends TileMapLayer
+
+var dirt_id = 0
+var grass_id = 1
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and event.is_pressed():
+		var coords: Vector2i = local_to_map(event.position)
+		set_cell(coords, dirt_id, Vector2i.ZERO, 0)