I absolutely LOVED the visual design of this game. The colors popped, and the lines were minimalist yet completely clear.
I love the core gameplay idea. Many games use dying on purpose, but this is the first one I've played that makes dying a challenge, and a fast-paced one at that. My favorite sections were places with spikes or pits so I could try to jump into them as many times as possible before they disappeared.
The music that is here is nice and fits the theme, but there's not very much of it. It sounds like it's only 4 bars long, so it loops often and gets annoying after hearing it many times. I think you picked a good song to match the tone of your game, but I would suggest choosing something longer!