OMG I love this game so much and I have some suggestions that will help develop it. If you can't, that's fine.
1. The ultimate button is a bit hard to press on PC. If you change the button to Z , the back button from ESC to X and Space bar to C. it will be much easier to play because every time you press ESC, the game will shrink the screen.
2. It seems that there are side characters at various points, which I would like to know their history. You can make a character history page or add them to the playable characters.
3. As per point 2, if you add them as the main characters, you can expand the game map by adding more floors to increase the challenge.
Anyway, thank you very much for making this game. I noticed that the game has a bit of a yuri feeling, like I found a treasure :)
Ps. Sorry for my bad gramma cause english not my main languegeToT.