Great but..
Great game but a few suggestions that have already been made:
Controlling the pieces would be nice if it was easier - it got boring juggling stuff around when moving them was slow and awkward - yes it did give a spacey feel but that was only neat for 30 seconds before you get irritated by the movement system.
Good idea - I liked the puzzles and how it got more challenging, adding more levels is always a suggestion.
Graphics were great and gameplay (ignoring movement issues) was well thought out.
All in all a good job.