The game is good, but a missed opportunity. I really like the idea, but it's just too simple. It's also pretty hot, but too short, and could have been much better with some more content.
The gameplay loop is basically, you invite girls to your "dungeon", first make them less alert, then throw them into traps, produce crystals and tech, then finally when they lose their sanity or catch "addiction", you drain their personality and throw them onto "butt-wall". After 35 days you either win or lose, depending on did you get the last technology or not. I found it grindy at first, then I realized you don't actually have to pick up the crystals - they get added automatically after a while. That made the game a lot easier. You also get automations as the game progresses, like moving girls depending on their status.
But the main problem is, the victory is binary. There's no point optimizing the "process". It doesn't matter how many crystals or tech you have, as long as you have "enough". The layout of the dungeon also doesn't matter - it makes no difference where the rooms are. Animations are ok, but yes, there should have been cum animations. So, good idea, but too simple.