oh great, game doesnt save progress!
went all around to open the purple key, went up there quite a bit, died.
guess I have to redo it all over again
Okay I made a small update to add the save prompt.
But I'm realising now that you were talking about something else: The lack of autosaving. Unfortunately, that can't be fixed so easily. I plan to add some sort of autosave system in future updates, but that requires extra work so for now there's just a manual save at save points.