Tesseracts

The fourth level of the dungeon I'm creating for Dungeonaday.com involves a tesseract. I'd made a "dungeon" based on a tesseract once before, in college, but it had been a long time and frankly I didn't even fully remember how the whole concept worked. Thanks to a quick question I put out on Facebook, I got it worked out. Basically, I just needed my memory jogged a bit.

I first read about four-dimensional cubes in junior high, in the Best of Dragon, Vol. II, one of a short list of game