Maybe a small sound before the good hit momentum could also help.
You wanna continue working on it? :3
The music and enemy movements are synchronized to the same rhythm the player should use, not sure if additional sound would help, but it is worth a try (can't test it on myself though, need to find someone who wouldn't mind suffering through a rhythm game without prior experience ¦3).
Yes, there is a list of things I wasn't able to finish in time, and I would like to address it post-jam.
One of the items there that might be helpful is an input delay calibration, as different devices may give you different responses to correctly timed actions (especially when playing with wireless headphones that add a huge audio delay, making it almost impossible to find the right time).