Disclaimers: This is more of a critical suggestion piece than a review. I've only played through the first level so far. However, I've played probably way too many brothel sims in my spare time and I feel I'm in a decent space to give criticism, or at least why I'd rather go back to other sims than this.
Gameplay:
Other brothel games break up the game loop better. In many games like Brothel King and Strive for Power you can explore the city and other factions, speak with/date people, get into fights, train yourself and your staff. That's probably way outside the scope of the game, so let's think smaller. Some games let the girls do different jobs, like dancing or singing, or tavern work. Everybody gets hungry in a brothel. This game only has advertising. Also, a big part of enhancing payoff is lacking here: edging, teasing, suspense; the sidejobs I mention help a little more with that. You also get to see the girls in a different light, which makes the sexy bits sexier.
On the less sexy but more game side of things, the game could do with some holidays, or events. Having more goals besides just building the brothel and completing the level. Maybe a VIP books a week in advance. Maybe your top earner wants sick leave. Competing with rival brothels. The story mentioned it was lucrative, so that would make sense, right?
Bifrost gives each girl special abilities you can use during the day. They can heal each other, or produce items, and its just another venue for showcasing the novelty of monster girls. Probably why personal training is such a big part of these games as well, you can make meaningful decisions about spending your resources even during the prep phase, while still making it sexy and fun. Ability teaching/inheritance also adds a level of complexity and personalization to your decisions, which is why breeding is part of a lot of these games. These are decade-old games too, one would hope to be building on the shoulders of giants, so to speak, not repackaging Candy Crush for the 70000th time. Terrible analogy, but I hope you get my point.
Emotive response/Relationships:
It's giving me a weird whitewashed vibe. I get wanting to be super wholesome (or not pissing off Patreon) but even barebone stories/settings need conflict to generate interest. Again, rival brothels seems to fit here. I also like how in other games you can pursue relationships with the prostitutes, giving you a more vested interest as the gameplay directly ties into how well the relationship fares. The other datable npcs seem to just be there, your decisions have little to no impact on them.
Anyways, if the dev reads this I hope I didn't come off too discouraging or condescending. I just want good games, and there's a dearth of that especially in this genre. Plus I have a fondness for pixel art.