I'm stuck...? Can this happen? can a floor literally have no exit? There's 1 room, a short tunnel, no exit. I can't find any secret passage or anything.
Check EVERY wall for a secret passage. I'm pretty sure there's no way the game will generate a floor with no exit, but there could always be a first time for everything. In the original Rogue Touch thread there were 2 or 3 people a day posting screenshots of dungeons with no way out, and 100% of the time it was because there was a secret door they hadn't found yet. Keep looking, if after checking every possible wall tile and still find nothing, then yeah you might be stuck. Good luck!