Thanks for the feedback! There are quite a few things that I would fix given more time, the beatmaps were not perfect as they were made with very limited tools, (wrote a beatmap maker) I also think there is some issue with unity WebGL export that makes the music slightly off, may be some issue in my code though. I 100% agree with it not going with the theme well, kind of just got carried away making the game without thinking about it too much. I'm still happy with how it turned out so that is all that really matters.
I would never hate someone for giving constructive criticism.