there's an easter egg/overflow bug for anyone who wants to go to floor 100. Suddenly all sprites are chubby humanoid rat torsos with backpacks wearing sunglasses. Haven't yet checked to see if it changes again at 200.
I'm so tickled that you found this! DragonDePlatino's DawnLike tileset comes with the stipulation that that sprite (I think it's an odd-looking dragon with sunglasses) has to be included somewhere in the game as an Easter egg, so I put it 100 floors down. Nothing else at floor 200 or further, sadly.