Kind of a cool concept for a game. I wouldn't really call this a physics game however. Also the ammo is never deducted giving you an unlimited supply of water. It could use an upgrade system, for example we could buy more balloons or ammo (if it wasn't already unlimited) with the coins we are collecting.
 "Computer Evolution"){kind=icon}
 "Water Jet"){kind=icon}
 "Headless Zombie"){kind=icon}
 "Rambo The Sniper"){kind=icon}