Visually I really like the palette and sprite work, the music and sounds are really well done too.
I also appreciate the level of juice you've put into the UI here, the XP animation is really great and all the subtle screen movements are really nice touches that make it feel really polished and alive.
Gameplay wise, I think the fact that there are resistances and a trade off for using full spells is smart and interesting.
I think I noticed a few things that may or may not be bugs, nothing major. I got 5 levels worth of XP from one enemy at one point, which I'm not sure was intentional (I definitely felt very powerful afterwards!), and the floors were doubling each floor so I ended up level 6 on floor 128 one shotting everything haha
Nice entry! Great work!