Honestly this is pretty boring. Aside from the achievements, there's really no reason to avoid dying, and the fact that all enemies give 1 XP regardless of difficulty really breaks the game. Perfect example is that you can spam up and down between floors 20 and 21 and if you can kill that enemy without taking damage, you can farm levels infinitely (there are likely other places where you can do the same thing,) making the whole system kind of broken and also defeating the purpose of potions. Also, even if you're trying to beat the game without dying, you can just use a potion whenever you drop below 50% health. There's no strategy whatsoever as to when you should use one.
Once you get past the weird combat mechanics, the game is puzzle and exploration. Navigating 15 floor mazes is a bit confusing and often tedious, but the puzzle elements are decent, even if it's frequently interrupted by level grinding. Once I got the pickaxe (but couldn't figure out where to use it despite seeing "need a pickaxe" messages earlier) I figured it was time to hang it up and be satisfied with the fake ending.
Between the lack of music, balance, and overall sparseness of anything interesting, this game just feels really unfinished.