Okay, so i'm trying to go easy here because its first version and still in developement so i understand some of this problems.
Mechanical issues:
-Camera, the one of biggest flaws of this game. It jumps like fucking kangoroo when you're climbing stairs. Also when you decide to invert Y Axis and use camera like in most of FPS games it resets whenever you enter next phase of day (for example Free time -> study time).
-Railings. Its not some big problem, but their hitboxes work just like fences in alpha versions of minecraft (they are too big).
Gameplay issues:
-Main character is just slow... don't they get PE in school or something?
-Can't advance time. In this version of game there's not much to do so your first instinct is just to go to clasroom and then? You wait... and you wait because you cant start lessons early or skip time.
-Not everything is clear, directions are sometimes hard to notice.
-Not much to decide... Yeah, thats an issue, it would be great to accualy decide what does MC thinks about scribble's that girls made.
-NSFW scene. Cowgirl scene skips too fast, also theres i believe this endscreen with cum all over one of girls. But it just arrives out of nowhere. It feels like it was thrown in there just to cut cowgirl scene.
So thats all i think that i saw. Game is somewhat like Koikatsu but with VRoid characters mixed with Yandere simulator's state of completeness. But still, i gues you made that in month where yandere dev made his "game" for 6 years. If you need help you can count on me, ill do my best to provide it to you.