You cannot be unhappy while playing this game. Try it. We dare you. Think horrible, gut-wrenching thoughts. Play on a bed of nails. You'll still feel great. This is the power of Joy Jump.
Have you ever wondered how the Doodle Jump guy has such insane jumping skills? So have we. There's no way those noodle-y little legs have hops like that. In Joy Jump, the characters have springs on their feet. Now that's the sort of plausible premise we can get behind.
Simple left/right title controls allow you to harness these springy powers. And harness you must, because high point totals are the key to unlocking eight different worlds, each with their own characters and items.