Played the non-NTR route, H content is probably split 40% non-NTR 60% NTR (see supporting images
here). Can't comment on the NTR route but the non-NTR route was well implemented. As long as you continue to tell the game you're not interested in NTR content, it keeps the story non-NTR. It's not implied the girls do it, it's not a "skip the scene" situation, it's a "NTR doesn't happen". This is good. Now, there are some dialogs from male characters that are like "damn your mom is hot I wanna f" but it doesn't happen.
To round out discussion on H content - It's good, mostly still scenes but a few faintly animated ones. It does annoy me that the character changes sizes wildly from scene to scene. In one he's teenager sized, in another he's toddler sized - it's fine but definitely an oversight. Dialog within is acceptably kinky. There is a nice harem ending towards the end. No preggo scene but you do get a "and they were all impregnated happily ever after the end" still CG image. There is a gallery at the end (this is how I know how much non-NTR and NTR content there is).
Gameplay is basically a visual novel. Thankfully the sandbox stuff is kept to a minimum and only used when it makes sense for the most part (ex: do you want to talk to that person over there, or not?), so I won't ding it on the usual "sandbox that should have been a VN" stuff. It's fine here. There are a number of minor bugs (like not clearing a CG off the screen, making you have to go trigger another CG scene and hope it has a correclty implemented clear function).
Grammar is poor. Plenty of "ive" instead of "I've", for example (genuinely don't think dev knows the difference between the two). I skipped most of the dialog. The story seems fine, I only read bits and pieces because the grammer/writing is quite sloppy so it takes me longer than it should for me to understand what dev is trying to say.
So yeah, those are the three main attributes. I mostly want to commend the dev for implementing a non-NTR route properly. So many devs into NTR try to do this by just putting a "skip the scene of the love interest getting gang banged and loving it" button and then the love interest is like "wow I love getting gang banged" immediately after, like... bruh, that's still NTR. The scene happened, the characters still talk about it, you just didn't show it... anyways, that's not what we see here (at least at v0.6).