Beautiful. I missed if it was said that abilities would give you side effects but I think the gameplay itself is good. I think I had a font error where apostrophes and commas wouldn't show or showed as white boxes instead but that's no big deal for me. The only thing I would recommend is small polish tweaks (like shrinking spike hotboxes, reducing wall jump horizontal distance, and minimizing terrain the player can get 'stuck' in). Otherwise a very strong entry.