Use the mouse or the arrow keys to move your cannon. Shoot bubbles at the bloops to save them. Destroying them is fine, as long as they do not fall out of the screen and do not hit your cannon. Hitting them with a bubble will get you a point. Use any letter key to fire a bubble. Hit a bloop, and get five points. If you hit a bloop with the right letter, you get ten points. Collect powerups to help you win. Good luck!