(Space) to shoot mortars, (B) to fire a wave of mortars from the back of the screen. (1 second cool down). Don't touch the sides, and try to not get hit and destroy as many enemy torpedoes as you can.
This game was made from "scratch". HAHAHA. Get it? What I meant is that this game is totally original. 677 destroyed torpedoes is the record set by me. PLEASE post in the comment section if you beat 677.