Fun game! I kind of enjoyed how challenging the game was, and the theme of time was very apparent throughout. Some feedback regarding things I think could be improved on:
- I think spikes should only be lethal when collided from the direction they're facing. There were a few times where I would accidentally die to spikes because I collided with them from the side going up. Two instances where this happened was the lone spike near the end of the game, and the second time when you have to wall slide down. The difficulty of these parts were fine though! Just that minor problem made it somewhat more difficult than I had imagined.
- I beat the game without having much trouble with time. I think it would be much more of a challenge if there was a bit less leniency with the time, to encourage players to keep on their toes.
- It would be nice if there was more control over the player's jumps. Sections like the wall jumping part near the end would benefit well with being able to "shorthop".
In the end, I think this game has a lot of potential since you have the framework of the mechanics down already, especially since it plays into the music. I would love to see how you evolve this concept with the music involved, because I haven't actually seen something like that done before!