Fun game, and I like the art.
I just got stuck though. Looking at the map, on the top row, between the first and third screen from the left.
I got a key, opened a door, then travelled north and got a nice screen transition where I had to travel back south instead. That worked just fine. Going back worked too. After doing it a few times quickly I was unable to move south from either tile. I could only move north, allowing me to switch screens back and forth, not much more.