An update: I rewrote the code that handles where branching hallways are spawned, which means that seed 5 and a the few other seeds that weren't working now work, and hallways will now spawn on both sides of the "main" hallway (not sure how the code I wrote earlier worked since it wasn't doing what it was supposed to be doing at all). Now I plan on adding some horizontal hallway generation code so that there's more than one path through the levels, but I'm sick of writing in TI-Basic's frankly moronic syntax so it probably won't happen for a while.