I love this, really addictive and a great use of the single control. Visuals are minimalist and polished, I could definitely see this on the app store. I particularly love the trail from the player and the particles when you slam down, it really makes the game pop. The large score on the background adds to the aesthetic without being in your face.
If I would suggest a change it would be to remove/lower the x momentum on the player so they don't move from side to side when jumping, I think it would make movement more intuitive and predictable. The highscore doesn't update but I'm sure you're aware of that.
Overall a highly polished game that I really enjoyed, well done!