Doesn't seem to be much to do, but it's a great start!
Some good QOL improvements would be for time saving. The ability to have the adventurers go through the dungeon faster, and making battles go faster. As well as including tutorials, like what stats do/mean.
It'd be neat if any adventurers we defeat with certain requisites (high lust?) would stick around to be servants for your dungeon.
And I'd recommend (though this is a likely a long way off) adding fetishes in, and maybe different models depending on your comfort of doing so. Adding males would broaden the demographic, and according to stereotypes furries could bring a lot of funding to this project.
No matter what you decide to do with this game, you've certainly got a new follower in me.