I really like this game idea as a super huge rhythm fan, but I do have quite a bit of critique for you guys as you continue to work on this.
Player Feedback - Make sure that when the player catches the note the have much more feedback so they actually can tell if they have caught a note or not. I find myself on the fence on whether I'm catching notes or not, and that feedback is really a core part of rhythm games and critical to making them fun and engaging.
Visuals - Make sure the visuals are easy to follow. I like the simple style but I think with slightly different colors it could be even easier to follow. I think the notes dropped much too quickly at the start of the game. I would suggest having it start slower and working towards a larger speed. Maybe have a slow and fast gravity property, and have when a note appears it be in slow gravity mode, and then drop in fast. So with this explanation, I'm saying that the fast gravity needs to be slower.
Wave Crossover and the Clap Attack - This is really tricky for me, because I like these mechanics, but every time I try to cross over the waves and then move them together to catch the small purple ones, I literally always accidentally activate the clap ability, and then it takes way too long to recover after this. I would maybe have the clap not have such a cool down, and make the overlap between the waves more forgiving, that way the player has control between the two and it doesn't become a rage rhythm game. (If my understanding of these mechanics and how they work is incorrect, then I wasn't able to follow the tutorial and understand how they work)
Overall I really like the idea! I want to make it clear that I mean this review in a critiquing way to help you in your process of working on this more, and not as a way to bite at the bad things about your game. I would definitely take a look into these polish elements though as they made it hard for me to play through and enjoy to it's full potential. But thank you for delving head on into rhythm games for this jam!
- Gruntled