Yeah, in the second level it lagged a lot but i dont think is an issue knowing the level is a test one. In the third it also lagged, i assume its the amount of objects drawn in screen that cause the issue. When i mess with gm i ussually have to keep an eye on the amount of instances of objects and what they are doing step by step otherwise my potato pc gets a little anxious. I tend to just opt to deactivate everything thats out of sigth and is not doing something important .I believe gm uses directX, at least gm8.1, the oooold one i mean. Aaaaand also i reaaaallly like the pixel art in the game, its very good, particulary the buildings.