This is a really fun beat em up! I think balance wise your basic attacks (light and heavy) don't have big enough hitboxes so are really bad when there's more than one enemy, whereas Tentacle Garden was way too broken and made everything really easy. That being said, it was a really fun time! I would also make Shiori's movement speed faster since as it is right now she feels really slow, especially since your camera is so far out so it looks like you aren't moving that fast.
If you made this into a full game with different characters like a Dynasty Warriors type game I'd play this so much.