Great and creative.

Second place upon finishing it the first and only time.

The only beef I have with this game is that with a graphics tablet, it's WAY WAY WAY WAY too easy :D

Still fun though.

Not too bad.

If you add some music, and make the box thing move a little faster, and make hitting the wall or whatnot just take a life/move you back a bit instead of making you repeat the level (which is annoying), it would be even more fun.

Also, you should introduce a fixed turning speed (in degrees), rather than make the box turn towards the mouse instantly. This ought to make maneuvering way more tricky and entertaining.