My Favorite's 2d bike racing & Stunts Game with great physics something like Nate-Adams-FMX a Java mobile game and Bike-Mania some ideas which will differentiate it from the games i mentioned above 1) Multiplayer (both of them are single player games) 2) except for you every other player will appear in ghost mode 3) it can be mixed with a stunt bike game like BIKE MANIA to make it more difficult 3) custom level editor so their so we can never be short on Levels... here are the screen shots of above games Attachment 24932 NATE-ADAMS-FMX Attachment 24933 BIKE-MANIA all the best GODbless