For your first finished game, this is very well done! I was very surprised when I got to floor 10 and saw I could swap out my dice, and that it worked :)
I encountered a few visual bugs (characters being inbetween pixels, screen tearing, etc.) but nothing game breaking.
My critique is that the pacing of the game could be improved. I love how fast the wizard moves... but casting a spell takes *ages* compared to it. It always feels better to just try to dodge around the creatures. I love the spellcasting mechanic itself (randomly determined spells) that makes me think of the wizards games.
Solid entry, good work. The music was great and fit the chaotic nature of the movement :)