A simple game - but really fun!
I was stuck playing it over and over again, trying to get deeper.
Art is simple but works, the simple art helps focus on the gameplay - more complex assets could have been distracting.
Music is good, but you probably could have easily done some variations of it. Maybe have the music slightly change as the player goes deeper?
Some of the ceiling spikes were odd: I was  confused if I can walk though them or not.
Biggest problem: No highscore! I would have liked the game to keep track of how deep I got. I know there's an ending, but a High Score count would have been great.
Really fun and engaging game, thank you for making it.