That's really cool, I love musical games. So much work in this one, you managed to make 3 maps it's generous ! And I appreciate the level of details you put in, like the menu's color change after selecting a level. 

Maybe just one point, sometimes I feel difficult to identify on which part of the music the arcs are supposed to match (beat, main melody or other) , especially in the 2nd & 3rd map. Idk if it was expected, but in some parts of the level I'm basing my inputs more on what I see, not really what I hear. (But perhaps it's because of my horrible sense of rhythm XD idk if other peoples will feel the same).

I'm interrested to know how do you make a map / place the arcs ?

Wow this was a really cool game! I haven't had the courage to make a rhythm game yet, how do you get the gameplay to sync up with the music?