MotoCross is a free flash game where you drive a stunt motocycle in a stadium. It takes awhile to download even on broadband. The actual background is professional looking but the character graphics are retro 80s. The gameplay is a little strange (or just a little hard). You can go forward, lean forward, and lean backwards. I spent most of my time flipping the motocycle over and landing on my face. Give it a shot if you want a challenge.