An interesting control setup, not just pressing a button. Very easy to download and play, which would be great for accessibility. A solid submission.
There are a lot of troubles with colliding with walls, so a bit more work on the collision aspect of the game would go a long way to making it a bit more polished. In addition, giving the player a way to quit the game would be nice outside of alt-f4.
All in all, a nice little game with a good premise. Working on the polish, adding some audio would make the game more enjoyable. Great effort.