Arrow keys to move. X to jump. Get to the Earth Cube to proceed to the next level. Avoid red. If you fall through the floor, press "R"
Thanks to xOnic for the original project, and to Studio Pixel for the pure platforming bliss that is Cave Story. I will eventually change the assets to be more Cave Story. Also, I might add a level or two. Maybe. UPDATE: Fixed physics, what with falling through the floor and all.