Arrow Keys are how you move. Dark grey is a rock wall that you can climb light grey is a barrier that prevents you from moving to either side, but NOT up and down. yellow bursts your space suit and kills you. The flags are checkpoints light blue is a jump velocity boost, BUT IT ONLY WORKS WHEN YOU HOLD THE JUMP BUTTON pink stops all movement.
The game is meant to be on the moon, so you can jump super high, and there is major velocity. Also check out my original game, Platform Marathon. There is a glitch that can occasionally happen after you complete the game, where, upon trying to click the green flag again, you won't be able to move. If this happens, simply click the stop button and try restarting the game again. It should work normal. Side Note - I have tested every single level in this game, and ALL LEVELS ARE POSSIBLE. SOME ARE JUST REALLY HARD.