Moving Dungeon

I've developed some "games" in game maker studio 2 a lot of time ago, but a friend is trying to learn and need help, so I'm trying to learn how to use that engine again to help him.
I'm very sorry about the game quality, but everything in this engine was strange for me from now, but I'll try to improve my skills at this engine again.
Posting this game to the Mini Jam 133.