the world needs less of a dime a dozen side scroller types. Not saying those retro games should be out, but unless it's really good... not just another 'me too!' game whereby you seek to make something already out there.
While I have it a 5/5, I feel it has A LOT of potential. Maybe easier orbits for starters. Drag and drop into the lines to keep them in orbit, or at least cues on how much to each side we should push to make a planet orbit.