in the falling sand games, the most annoying thing is when you have a sweet bomb an dthen your comp starts lagging lol
i just was toying with my backgrounds and stuff and i found out that a good way to reduce lags (at least on WinXP) is to do the following
1. right click on any empty desktop space
2. go to properties
3. go to settings
4. go to "advanced"
5. go to "troubleshooting"
6. move the slider all the way to "none" and press OK in both windows