Itās a fun wave defense game with a rhythm based combat. The visuals are really good!
The gameplay gets repetitive quite quickly. There isnāt really any challenge once you get into the rhythm. Maybe some more abilities tied to keeping the rhythm would be good. Or some variation of the tempo.
I also with there was a more pronounced beat in the music you can use to gauge a rhythm. And some sort of audio feedback that tells when you pressed on/off beat.
But nevertheless, great job!