Thanks for playing! We tend to find the game has peaks and troughs of difficulty and it seems to be around the 60 mark players have to really fight past so not a bad attempt at all! I will say that there is a large random element to it and those poor spots will sometimes have a great use... Time is also of the essence and enemies will scale with time, whereas new enemies appear with height! So if you hang around too long on lower floors you may find the enemies out scale your damage! Glad you had fun though and we appreciate the feedback :D