Use A and D or arrow keys to move the cannon around. You can only shoot when the cannon is not moving. Touch the cannon with your mouse to see how many shots you have. You can only shoot after the one you just shot exploded. Idea: Timer for speedruns, Bonus Objectives (Wrap, you shoot around the left side of the screen, and it hits the enemies on the right Pinpoit, you can't miss, etc.)
Credits to @CreatorPerson90079 and @EPIXbillydowntheroad for the music ideas