There's good weapon variety, each one's interesting in it's own right and having to roll for them keeps the fights interesting.
The narrator introducing the bosses is a neat way to hype up the fights, but it gets old having to wait through it each time you respawn.
It would be nice to have some air control, I think it would make the movement a lot more intuitive, especially since you implemented wall running (very cool btw) and designed the last arena with moving around a lot in mind.