Solid little game loop. Took me a minute to figure out what I was supposed to do. I would maybe put a little bit more at the beginning that is a bit simpler. That way people could more quickly discover what to do.
Other than that, pretty fun! I got to 70-something I think. It's a bit hard to tell as there's no gameover screen, so you kinda just have to look right before you die. Could also use some music!
Cool game, nice entry.