Up arrow key to go forward. Left and right arrows to steer in flight. As you are in a planet's atmosphere, you will slow down if you do not keep using thrust. If you are outside, your momentum WILL NOT STOP. Try to land on all the planets! Also, if you see a flame-colored rocket with FGL on it, thats me. The box in the top right is how many players are online. The box in the bottom left shows how far away you are from the nearest planet. Space to shoot a laser (entirely decorative, does nothing).
Thanks to @griffpatch for a lot of the code and the game mechanics. This would not have been possible without him. Thanks to @ScripthDev for the music.