The idea is very cool, the graphics though simple fit well. I know from friends who tried to make a game on music beats that it is quite hard. So good job :) I played on the tutorial (nicely voiced) and a few songs.
I think I spotted a few bugs:
- I don't know if it's intentional, but we can actually go out of the ring if we "force" a bit against the walls
- Some laser sprites stay on the screen until you close the game (even if you go back to menu)
- I had to use pause to go back to menu after the tutorial, I couldn't use the options given
And it's not a bug but I think it would have been a bonus to show the controls from the start. I tried to click and use WASD buttons for few seconds before realizing I need to use the arrows (in the menu) haha.