Well done!! This was a lot of fun to play and definitely had me wishing for more levels! As far as critiques go I can really only think of 2
The hitboxes for the character and spikes felt a tad big to me, there were a few moments where I would be KO'ed when visibly there was a lot of space between me and the spikes. For a rage game generally this is alright, to a degree, but its important to toe that line so it still feels achievable to dodge without feeling like the game is unfair from a mechanics sense, as opposed to a gameplay sense. Another solution would be to just make the sprite for the character or spike bigger!
For the last level, since the second level was solved by going to the left and top of the level (something I would try immediately, for some reason) I was able to bypass the entire stage by running on top of the roof to the end on my first try. Maybe putting a trap up there for players like me would help nail in the "game is against you" vibe!
Overall this is a very well put together game, the controls are tight and responsive and it was a genuine joy to play. I hope you make more content for this game once the rating period is up, and I'm excited to see what else you get up to. You should be very proud!