Stylish art and music! Fun how both characters are constantly grooving, sets the mood. The art of the floor is stylish too. Neat mechanic how the arena expands when you get hurt. Though I don't think it's reasonable or maybe even humanly possible to beat the whole thing on the innermost ring. And in a way, the expanding arena makes it so you only have effectively 1 hp total, since you will very likely end up fighting on the biggest arena size. But it's an interesting idea. Also, this mechanic fits the "on the edge" theme!
I think I made it pretty far after a few attempts, maybe about 1:30 or 2:00. Nice sync with the bullet patterns to the music. Though there's definitely potential for more variety in bullet patterns. I wish I didn't lose all my progress whenever I died, and have to repeat a bunch of easy stuff, it gets a little repetitive. I played on the Windows build, which is outdated, and you mentioned having two difficulties, which I think is great! I would have enjoyed the easier difficulty. You may want to ask one of the jam organizers if you can upload the correct Windows build, since it was just a mistake of uploading the wrong file.