Nice game! Pretty deep in complexity. I got flashbanged by the first boss's abilities and once I defeated him :-(
I got the god speed powerup afterwards and it felt way too fast? I was instantly teleporting to my destination and could not control the character at all. Not sure if that was intentional, it might be tied to framerate since my monitor is 240hz.
Another thing is the slimes and their attacks were hard to see being green against the green background.
Otherwise nice submission