Make your way to the right, to the green wormhole. Do not touch the Sun. On a planet: right-arrow walks forward, left-arrow walks backward, up-arrow jumps. Moving is tricky because up and down depend on where on the planet you are standing. In space, gravity controls you. If you sail off into space, wait half a minute and gravity will pull you back. Or you can press "r" to restart the level. Every level is possible.
The wormhole has no mass or gravity. The player is subject to gravity all the time, even when standing on a planet. All sprites are draggable, if you want to experiment. The project takes advantage of the fact that blocks that take sprite names accept variables. The formula for gravity involves all the masses and inverse-squared distances of all planets in a level, for better or worse.
