Firoball is correct. In Windowed mode for my experimental level (that is otherwise empty), I get 200+ fps. Running the same level in Fullscreen mode, I don't get past 60 fps, which happens to be my monitor's refresh rate. I use a CRT though as I'm not going to spend 3 times as much on a TFT that supports 1600x1200 as does my CRT.

"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip My 2D game - release on Jun 13th; My tutorials