I had some trouble with the random number generator (which I was going to use for the particles and map generation).
I will see if I can finish it later today. Here is the incomplete version.
I like the idea of going between cloud layers. And with space, everything's so far away, you don't have to worry about parallax backgrounds... ; - ) FWIW, even if you can't get the game as complete as you want, submit anyway -- it's a good way to keep a record. And when rating, even if the game is not fully playable, I still try to take into account the criteria.