No one wants to live in a world of squares and that is exactly what will happen if someone doesn't help. The evil squares are capturing the red balls and taking them to their factories and reshaping them into squares. Eventually, they will turn Earth into a square. They must be stopped and it's up to you to stop them. Avoid all the dangers that you come across and try to collect all of the stars you find along the way. You can destroy the evil squares you come across by jumping on top of them.