I think I mentioned this to you in Discord, but the chilled-out music is a must-have for such a tough game. The best score I could get was 21/50 on normal mode. I think you nailed the limited scope and the cycle theme. Everything feels complete: good control and hit detection, audible feedback, and clear end states are things that a lot of games end up not having due to the time limit.
Overall, one of the standout submissions I've seen so far. :)