Super cool! Love the art, the shader for the enemies is sick. The sound effect on the dash is really satisfying! I really wish there was some indication of what abilities did as you picked them up. I also think having to hold up for the super jump is really un-ergonomic, would rather spacebar jump just had the potential to be held longer once you get it.
I ended up falling off the edge of the world for forever to the left of the castle. I reached the top of the castle (to my knowledge), didn't see anything, and jumped off... did I miss an ending?
Really great entry overall though! Would be curious to see it fleshed out more, I really love the lil wizard