Well, I made it to 100, thanks to the pause / savescum glitch people mentioned earlier on. It's interesting, I feel like the design must have been intentional in that regard, because the game is still very tricky when taking advantage of it once you get past around floor 75. You have only a very short time to pause it before you get autosave locked into going up or down, and then at very high levels the period is even shorter. Past 89 you have this problem where if you pause with the first digit presented, you don't really have enough time to repause and you don't know if it's actually higher than your current number or not. Sometimes you roll a single digit, too, and it ends early so if you were timing to pause after two digits it's too late and you have to go back down. It's pretty interesting how that works.
I had to turn the VFX off because they make the savescum glitch much more difficult, but even without that you still have the crazy room glitching that randomly can remove stair or put rocks in front of you. On the last floor even I ceased to exist after a while.
Of course, the game is secretly fairly kind in a manner of speaking, in that it provides you with free floors - there's several scattered through that don't have a required roll at all, especially in the last fourth. You can never be forced to go back down through a floor without a required roll, because you can always just go back up from there. So it's sort of like a save system. Still, the middle floors were agonizing enough to try fairly, so I can't imagine that it actually makes things much easier when you're trying to get very low numbers in a row like the 90s. The nature of floors 93 and 99 makes them easier than you might expect, but I think the hardest part of the game is probably the path from 94-96, where you have to get 3 minuscule percents in a row. I haven't tried going back down yet, which may be even harder. The most obnoxious floors are probably 58 and 59, which you'll be seeing a lot of, due to their winding nature.
My favorite characters are the guy trying to build his own staircase, fell off the bridge, the duel to the death, the height researcher, the person trying to start a cooler party on floor 49, and most of all, the old guy who supposedly does the tower twice each morning. I like to believe he exists.
The thing at the end is interesting, I suppose. Rather unique. I wonder if the tower itself is alive?