I absolutely LOVED playing this! The humour narrative that plays into mechanical changes? The background visuals? Hell yeah, dude that's AWESOME!
Only complaint was that gravity was a bit low when you turned mutant, and it took a while for me to get back down to see your cool new background images again. Wouldn't complain about the platforming being easy, though, and I actually think the low difficulty helped out alot since I wasn't spending time trying to retry any one section over and over.
Nice job overall, keep it up =)