I like the overall idea, it was enjoyable to me.
I'd suggest to put some actual border though, so you can't leave the screen. It completely disorients and usually results in a death when trying to come back.
I also noticed that the music stops looping at some point (not quite "loop"-y, is it? (I'll see myself out...)).
But yeah, overall decent entry, I enjoyed it and had fun playing it : )