Note: I don't believe a complex opinion can be properly represented by a number but I do understand some people are impatient so I don't use the star system normally, my ratings are as follows. 1 don't recommend, 3 unsure please read review, 5 recommend.
Okay so SexNote is a game where in a random highschool student finds a book that helps him fuck every female in his life. Bog standard as far as these games go but whatever.
These games tend to be samey but that's what the "boy fucks family seductivly" or "B.F.F.S." fans are into. Plus it's not like their aren't some unique elements to this game.
Gameplay for example, Ren'Py games are generally lacking in gameplay and in most contexts that would be seen as a bad thing but in porn games I'd argue it's the best possible thing. See porn games are unique in the games industry, There are games that focus on gameplay, music/rythem, Story heavy games, but in the mainstream there are few if any games that focus on graphics as in the art is the main and primary selling point. Porn games are those games, the art is the most important part, as Reggie would say "if it doesn't make me hard, why bother". So the gameplay in this being exactly challenging/tedious enough to slow progress without hindering the fucking and allowing the sex scenes to slowly boil make for a pretty good Ren'Py based fuck game.
The "Gameplay" so to speak is going to rooms and clicking bubbles until you've clicked enough bubbles to make clicking bubbles easier. Very riveting.
The art is almost certainly why you clicked on the game in the first place, very top notch, but not perfect. A couple of the characters particularly the best friends mom and the main MC both have the dopey face and resemble art from Big Mouth and it can hurt some of the scenes. The patreon for this game uses votes to determine which characters get love each update and it's no wonder why the friends mom has been largely avoided. But most of the other characters make up for it, MC's mom and sister, the aunt, the horny housewife *red dress in the banner*, the therapist of course and who could forget Hinata, just straight up Hinata from naruto. Never got into that particular show myself and even I could tell.
As far as the sound design goes, no Voice acting so it doesn't matter, there might be music of some description but I don't remember and no one cares enough, least of all me, for it to be worth double checking.
There is some over arching story about good vs evil and the chi-bi things in the banner are like faeries or something. My overwhelming lack of interest and passable at best writing made it difficult to follow. The over arching story and the character stories basically don't intertwine at all and I believe you'll find the story on trying to fuck your sister infinity more interesting than the one about fucking some fairy hoes/saving the world or something. Saying the world will end if the MC keeps doing what ever he's doing, and then nothing happening when the MC continues to do what he's doing does not a good or interesting story make.
But who are we kidding, it's not like anyone's here for that, you're here to live out the sick fantasy of plowing big titties bitties even if they're close realitives, and that is exactly what you do. While I'd like to see some more work on other minor characters like the Teacher and the nurse I would say right now it's in a decent spot and I'd recommend a download and a support of Jamliz pateron, I'd give a few bucks if I wasn't broke. It's High Quality art with lots of incest and lots of sex even for a fairly early build.