Your goal is to gather all the coins in each level. Move with WASD or the Arrow Keys. 

Brown boxes may block your path to the coins. If so, find and collect cannonballs and load them into your giant cannonball head. Press Space, U, C, or O to fire. You only have a limited number of shots, indicated by the number on top of your head. Since your cannonballs only fire directly upwards, stand directly under the boxes when you shoot them. 

Look out for moving platforms — they will crush you if you aren't careful!

In later levels, you'll encounter enemies. Jumping on them won't work, so just avoid them.

If you're stuck, you can watch an ad to show the solution!