I really liked the character dialog art in this game!
One thing that really annoyed me about that gameplay is that shooting felt annoying because you can't spam click since there's a cooldown, but holding down the mouse button doesn't work either since there's no auto-fire, so you have to figure out the tempo and click to it. Maybe this is fitting given that the "bullet" you "shoot" is a music note, but since the inputs aren't buffered, clicking slightly early just makes nothing happen, and it ends up feeling really awkward to shoot.
The enemies also continue attacking you after getting 1000 points despite the dialog saying otherwise. Not sure if that's a bug or just an oversight.
Also, what's with the random purple ellipse in the bottom-right? Was that a scrapped magic mechanic or something, or is it a graphical bug?
EDIT: Nevermind, it's the recharge meter for your special attack. I forgot that was a thing
But otherwise, it worked fine for me on Firefox- I didn't encounter any crashes that others mentioned.