If you don't mind me asking, what game engine did you use to make this game? It's one of my absolute favorites! Especially, Supreme with Cheese and Sleepless Hollow :D
There's not really an engine. Just made from scratch. Used the MGL engine, and then I think SDL in later ones, or some other things, but those aren't "game engines" they're just graphics engines. All the game code is homegrown.