I cant help you with building games although i do agree, there arent enough. I can on the other hand give you the single most amazing game ive ever played, Hands down. "Redstone."

Ps. The game Redstone recently (like a few 2-6 ago {im bad with time}) changed hands from the K2 network to L&K logic and hence the website and servers and such changed. The current website is: redstoneonline.net