I was able to beat the game haha
But seriously, there were levels I beat on the first try, and others where I DIED TOO MANY TIMES!!
I think you should add controller support. The music is good, but, it sometimes get a little too repetitive :/ (It's at least much better than mine coughs)
I really like the artstyle!
And, for the controls, well...
I kinda like them? The vertical velocity increases a little too much after pressing the Space button a few times though xD
But if you wanted to turn it into an actual rage game, you could make it so that dying more than 3 times in a row in a single level sends you back to the one before >:)
This is what I'd call a rage game, good job!