I think the music changing speeds helped make sure it didn't get too monotonous because it was a short loop, so I'm glad it was well received.
I agree on the double jump. I didn't plan my assets with a double jump in mind, but then as I was playtesting, the game felt awkward without one. I think if I'd had more time I may have put in a skateboard trick or high jump in instead to get that extra bit of air.
Thanks for checking out my game and devlog!