This game of course begs for Troll levels. And we just had to start poking around and see what we could do with it. Along the way, we made a level that had, 242 floors(mostly basements, actually).
Now, we're not sure if this is why, but the stage also takes several minutes to load, and does so on every single reset, and it's a troll level, so you are expected to restart a lot.
Can you have a look and see if the quantity of floors is responsible for the massive, almost intolerable, load time? If so, if it could at least keep stuff in memory in a way for a quick reset once the load completes. Or, we guess maybe you might want to consider limiting the number of levels to a quantity that doesn't cause massive load time? As is, the user likely thinks the game froze.
The level is named "It Begins"