Hey!
In my opinion, the biggest problem you have is the scale of the arenas. I like the idea of exploring a map to find the boss, but for a boss rush, I think it's best to get to it faster. A few ways to solve this would be to make the arena smaller/make the boss bigger/have an indicator pointing towards the boss. I think avoiding hazards and platforming could work really well if they were happening while fighting the boss.
I like the worldbuilding; the banter before missions and dancing are a good touch as well, it added character to the protagonist. The rumours being both a clue and part of the story was also cool. You did a good job with the icons, and the assets you've chosen work well together, and look like they belong to the same world.
Since there are only a few days left, I am rating and giving feedback to games with few ratings. I would appreciate it if you rated my game too. No need to leave a comment, unless you feel like it.
Thanks for the experience =]