green is w and s to move up and down then d to shoot. red is arrow keys going up and down and then left arrow to shoot. don't get hit by the other persons shot, hold shoot while going down or up to make a stair shot, if you shoot enough in a short amount of time it will make a temporary spike. also make sure that you get another person at your house to play one side well you play the other.
a big thanks to captainfieldday for reminding me that scratch still existed.