Crystal Towers is having some progress made on it now, thanks to the threatening topic a while ago. Well done. In return, here's a video of the levels made so far - this shows sections from all ten of the main levels throughout the game (split in to two stages each). All that needs to be done now is getting the final levels finished, along with the titles and so on.
The video is one minute long at 3.5MB. It was put together by Circy, with the Crystal Towers theme by me.