To move around, use A/D or the left and right arrow keys. To jump, press W, the space bar, or the up arrow key. To duck or fall off a semi-solid platform, use S or the down arrow key. To fire Superballs, use the X key.
SPECIAL THANKS to @Griffpatch I made-- a thing! There are currently 6 levels and 5 of them to complete. Tell me if there's anything to improve or change.