I have an embarrassing number of hours having watched/played Slay the Spire. This game is most like that...but with a few key differences.
The lust system is the game's best feature and unique to this game. It functions sort of like StS potions in that it accumulates slowly but is saved between fights. There are two huge reasons why this system singlehandedly makes this game worth playing. First and foremost, it integrates the sex into the gameplay. Having an adult game that merely has some gameplay and then has some sex and just alternates between the two seems to be the standard, but its really unsatisfying. Second, it gives the player some very meaningful long-term decisions (i.e. take the extra damage/shields now or save them for later). I only wish the game leaned into this a little more for unique effects like the single target 3 turn CC (not just things like a bit of damage/shields).
There are a few issues that could easily be fixed: make the deck always viewable, always let the player see what an upgrade for a card will be before taking it, and so on.
The game is fairly balanced but relies on RNG particularly when going from act 1 to 2. In my first run I didn't get offered good relics or rare cards and simply got whittled down. In my second run I got the relic that upgrades a random card every time you don't take a card reward (OP by the way), a couple 0 cost +2 mana +3 draw cards, and built bleed/shield retain. EZ Clap.
I hope more classes and/or viable builds are added for replayability. I didn't really see many options for effective offense other than bleeds, and shields/retain definitely seems like the strongest defense.