Interesting concept! The art individually looks really nice but I think it lacks a little polish and cohesion, with all the different pixel sizes for different sprites it can look a little jarring at times, I love the character design and animations though.
The debuff mechanic is nice but it didn't really serve much purpose in my run, because it's easy to avoid and it doesn't change the experience that much, but I can see this idea being implemented in a more complex game to take full advantage of it.
I'd also recommend checking out some polishing techniques for the player controller, like gravity tweaks, variable jump height and coyote time, it might improve the feel a bit and help to create more interesting platforming sections!
Good job!