Thanks so much for your feedback!
And yep, you caught me. There is one cut level that was going to serve as the bridge between those two levels.
In case you were curious about the reason:
The definition of the floor isn't actually changing from floor-to-floor. What you're seeing is the golden rule is that the upper floor always produce a physically possible lower floor, even at the expense of the canonical floor map.
In other words, if the upper floor says that there is a ladder descending to the lower floor at X=2,Y=5, then when the player descends, there will be a ladder ascending at X=2,Y=5 regardless of whatever normally should be there.
The players subconsciously experiences this by ascending/descending, but they never take it into their own hands to purposely & actively override a lower tile -- that was meant to happen in the cut level.
Hope you had fun and thanks again for taking the time to write up your experience.