Game of bricks is a classic game where you have to move a bar on bottom of screen to bounce ball which breaks bricks on top. Guys from Cornell university have designed another version of this great game. They used a DE2 FPGA board connected to VGA monitor.
Instead of using mouse or keyboard they went with hand motion control. A CCD camera simply reads hand position images. Hand is recognized by using human skin detection algorithm. After this complex part is done there follow simple control commands like moving hands to sides moves the bar on screen. Hand going up and down speeds and slows bouncing ball.