Thanks for your reply. I'm drawing the app surface this way because I want the sprite and particle effects to be applied on the full canvas and not on the 320x180 canvas, it looks a lot better on a bigger canvas. Thanks for the solution! I'm sad there's not an easier solution, I guess I need to change all mouse events for my >50 objects if I want to implement this feature. I'm just very surprised that there is no function to change the position or aspect of the application surface; you can change the place where it's drawn, but it's not actually there. If this was possible we didn't need this workaround. Maybe I'll one day send yoyo a feature request.