arrow keys (left, right) to move. you're on the ground, and you're trying to hit the bad guys with your paintball. you have the normal paintball; the others have colored halos around them. you have 3 lives. when you get to the next backdrop, you get ur lives back. the way you aim your paintball is by shooting it, and moving it to the spot you want it to be. if you kill a guy, his paintball usually stops moving in the 1st backdrop. if something's not working, stop and start it again.
thanks FLYNN649 for teaching me the health and lives script. yup, that's it.