I think the biggest thing you could do to improve the game at this point is work on creating better visual clarity about the game state. You list darkest dungeon as one of your inspirations for this game, and I myself drew that connection while playing it, but there are a few things DD does that your game doesn't do quite as well and I thought I should point them out for your consideration.
First, visual clarity: with darkest dungeon, all your characters status effects are in view. You've the health bar, the stress (analogue lust) bar, status effects, and so on, always visible just under the character's sprite. Without that, it's difficult to get a good handle on what my parties current status is, especially during battle when the character portraits disappear. I feel this clarity is a must.
Second, the camera moves around a lot. Like, a lot a lot. It does so in DD too, but I find it frustrating when DD does it too much also. Not every move needs to change the camera in my opinion. This is of course just an opinion which like all the rest of my feedback, you're free to consider or ignore.
Third, the map shows too small an area for me to find useful for navigating. You don't have to take the DD approach of showing the whole map if you don't want to, but I want to know about more than the hallway or room I'm currently in.
Fourth, one of the things that makes navigating the hallways of DD easier is that your always moving left to right, regardless of whether your facing north, south, east, or west, moving right means moving forward. This is a feature you kinda implemented in that your characters are always on the left side of combat, but your character moving left to go west, while more diagetically consistent makes for confusing gameplay in my opinion.
Fifth and finally, I loved the game and look forward to whatever you choose to do with it.