I got through on my third try. The first time, I almost made it, but I was completely caught off guard by the layout change and ended up dying to a Resurrectoid near the entrance. The second try, I was feeling impatient, so I beelined for the dragon but didn't pick up enough resources along the way to make it out. The third time, I meticulously cleared out the whole dungeon, making use of my accumulated knowledge (mainly that it's cheaper to paralyze Resurrectoids than to spam Thunder).
This felt like there was a lot less uncertainty and ambiguity than your previous sketches, and it's more like a static puzzle. There's some elements of luck (dodges, crits) but they didn't seem to sway things too much. I think the first attempt is the most delightful and exciting because you have to react to the unknown chest contents and surprise layout change, rather than playing around everything using advance knowledge. It felt like it was balanced in a way such that it's reasonable to win on a first attempt, even if I didn't manage it.