Use the arrow keys to move player 1. Use W.A.S.D keys for player 2. to move player 1 arms use 8,9(for one arm ) and 4,5 (for other arm). to move player 2`s arms use t,y (for one arm ) g,h (other arm ).
use arms to do tricks in air and to get up when you have fallen over .--- there is no finish line so you can add your own jumps near the end.