I like the music (although it loops a bit too obviously) and how it looks. The big problem here is that the actual game play isn't actually explained. At no point is it made clear that you're able to double/triple jump. When you die, it would be awesome if there was something telling you what happened. Where it stands it's never really very clear why you're dying. Definitely potential and the code seems to work, I think there's just a few user journey issues that you'd profit in updating.
Good luck in your future ventures!