This game is remarkably polished for a 48 hour game jam, you could totally publish this a real money costing game on steam with a little more polish. Add some new items, new enemy variants, maybe a boss fight or 2, one other room variant like shops or upgrade center, where you could pick up specific items or get reserve inventory space, and a couple of settings and accessibility features, and I would legitimately pay good money for it. Love this a lot, keep up the good work.
P.S. you can have those ideas for free.