Really loved this game - simple, original mechanic executed brilliantly. Puzzles got continuously trickier but stayed fun (I'm still stuck on the one with three stars at the top with black hole on the left and white hole on the right -- I see someone else commented saying they found that one tricky -- can't see how to use that white hole!!)
I also loved the constellations aspect - really enjoyed making these as a reward for finishing levels.
One of my favourites so far, hope the game gets expanded!