Fun idea, but there's a lot of small problems holding it back.
Speed is meaningless as far as I can tell, since you always just take turns attacking. So any equipment that trades main stats for extra speed is an immediate write off.
Every unlockable slot being shields means that you're damage basically doesn't improve after your first couple of runs. Especially since weapons seem to be capped at uncommon rarity, so I never found a weapon that dealt more than 4 damage.
Enemy abilities seem to just not work at all.
Your equipment randomly turns invisible when you die sometimes.
I'd love to see it polished up and expanded though, there's definitely a lot of potential there if you wanted to turn this into a larger project