There is something with the pathfinding.. sometimes.. in some locations.. And I can't figure out how to consistently replicate it, so I don't know how to explain it much better!
The fact that you've managed to set this up from nothing with the whole grid based location system, which you can surely expand on by increasing the size and adding other events, is really really cool. It reminded me a bit of the old pokemon games (blue/red) when you'd have to go through a dungeon and push boulders around down holes etcetera to eventually be able to reach the other side. Not sure if that hits home, but that's the vibe I got.
I'd love to see a larger version of this in the future!