This game hits your standard notes and tropes for its genre. The protagonist is an unsensational guy who intervenes in a mugging. The victim happened to be a sex demon who gives him Sex Powers as a reward. This includes a penis as long as his forearm and twice as thick. After that he basically has sex with every other character (all of whom are big titty bimbos with archetypical personalities- childhood friend, doting milf, horny auntie, tsundere sis, naive ditz, etc.).
Gameplay loop is simple. Consult the walkthrough, go to a location, trigger a scene, progress through through each Sex Interest's path until you achieve 100%. There's no choices to be made except which character you want to progress at any given moment. It's a VN with extra steps.
The models and are premade assets from a program called Koikatsu, so no points there. There's no overarching plot or conflict, so there's no real stakes, and thus no reason to read the dialouge. Will the horse dicked protagonist have sex with the sluts who are throwing themselves at him? I bet you can guess. Contrary to what people say, many people do play these things for the story as much as the smut (there's literally millions of hours of video online that is just no frills porn that's easily accessible and yet thousands of people play these games). A lot of authors shoot themselves in the foot by not including some through plot or conflict, even a flimsy one, that is left after the characters reach their climaxes. Succubus Trick is no exception. It's pretty boring, both in terms of gameplay and story. Usually, when the conceit of a game is that a demon gives the MC sex powers, there's a price to pay or conditions to be met, as well as tension should the protagonist fail in some way. in ST, there's none, not even a little bit. If you have seen any of these archetypes before you can safely skip every bit of dialouge. Once you get through each character's path, there's no reason to interact with them unless you wanna repeat a scene.
On the positives, it's a functional executable. Besides a minor bit with the walkthrough messages staying on screen even after you leave the walkthrough menu unless you intentionally close them, the structure of the game works, the videos play, there's no weird bugs. The author included a weekly day cycle, but basically added a QOL convenience to completely circumvent it (which begs the question of why keep it in other than they saw it used by other games).
So in short, this game is a functional example of its subgenre, so if you're love the sight gag of various flavors of bimbo being shocked by the sight an enormous cock attached to a skinny twig of a guy, this is for you.