cool idea. I thought it was pretty clever how in the blue levels, you spin after wrapping around the screen, although some of the levels required you to constantly look up and down which was a bit tiring. I thought the controls felt good up until the hardcore levels, at that point I kinda wished the player's movement was less floaty and more snappy feeling. Also, I got as far as level 16 but for some reason level 16 doesn't show up in the level select menu (Edit: just read the known issues section and you already know about this :P). Despite my issues with it it's overall a pretty fun and creative game.