Very interesting concept, basically the "travelling sales man problem" as a rogue-like. :) My best journey ended after discovering 38 locations, and I've managed to reach the World Crystal only once so far (it wasn't very impressed :D), but I feel like I could spend a lot more time with this. Well done!
As others have said, audio would have been nice for the atmosphere, but it's fun to play with my own music as well.