This game reminds me somehow of the old electronic devices you could get around the time of the NES that would play just one game, like Snake or other games. There were little, limited buttons, but they really did a lot with them.
This is the text version of that; you can just move N, E, S, W and Z. But this huge game exploits all of that. It can be finished in 2 hours with the walkthrough, but if you want to do it on your own, you need to do some exhaustive searching. Some of the truly unfair puzzles seem to be solvable if you just keep searching everything over and over again.
If you like this game, you should like DiBianca's other games. This was the number one game in the author's vote.