The End Times Brothel has a fun concept in its convergence of realities, which allows the author to combine real and animated porn for its graphic components. Unfortunately, the execution is currently in an undesirable state on multiple levels.
The UI is VERY rustic, with some options showing up twice on the page, some options being hidden at the bottom of the page, and a kind of generic wallpaper making up the background at all times (the background is dark-mode friendly, though, so that's a plus).
Mechanically, the game isn't balanced or interesting. The fights that you can win are grindy and lack player engagement for reasons I'll address in my next paragraph. The fights you can't win are downright impossible until you grind and probably shouldn't show up until a minimum level requirement. The way you get stronger is not very rewarding to the player (you just collect money until you can train, meaning once you beat the succubus and Lauren, you're going to be grinding money for an hour until you can buy the next upgrade).
Finally, there's no real storytelling to the game. Random characters show up with no introduction when you explore. The people you put to work in your brothel never interact with you. The fight actions have no logical stream to them. There's no reason why something is a crit (or any explanation on why receiving a blowjob would cause more lust damage to my opponent??) I don't even consider the current content to be "skeletal," because there's no real structure to it. It's more like several bones tossed into a pile for the player to pick up at random.
This game seems like a nice project for the author to improve their front end coding skills, which is awesome, but as a player I would avoid this game until it gets a lot more polish. (Currently v0.04)