I couldn't figure out the last riddle so I didn't finish the game.
The levels are designed in a strange way, I didn't understand what the flowers did to you when they hit you, same goes for the supermarioish black ball. The collider of the door in the first stage is miles away from the actual door.
It's weird that between the stages the camera zoom changes. Also the text box from the third stage is active even when you move so it get filles all the times with wwwwwwwwwwwwwwwwww and ddddddddddddddddddddd and so on..
The art is kinda cute, I didn't undestrand the audio track, was it fire foley? So why is there fire in Purgatory?
There's a lot of things to improve, keep going and good luck!