Gameplay:
It's jigsaw puzzles of the scene you'll see next. Difficulty doesn't change anything besides the selfies you receive through the (very buggy) text-messaging system as you play. My advice unless you really like jigsaw puzzles and jank: look through the forum threads and find the CSharpAssembly file (or similar name) to just skip the minigame altogether, it's not fun and takes a lot of time. The still images, while small parts of the game, are worth it. The art rules.
Otherwise, the UI looks pretty but really needs some fixing up in places, namely the "combo" button in the proper game and a few buttons having weird bounding in the menus.
There isn't enough art/porn to justify the gameplay. On Hard, you can spend well over an hour on these puzzles unless you just really rule at Jigsaws or get lucky. The game really needs 1-2 more scenes per character, most games have a standard of handjob/blowjob, titfuck/pussy fuck, then anal/pussy finish. Doesn't seem like it would take much work to allow us to switch between hands/mouth/tits in one scene, then pussy/ass in the next. Would easily double the amount of content without much animation or programming work, could make the game a lot better.
Small niggle, but give us the option to finger their pussy/ass or play with their tits while fucking them instead of having to stop the action just to grab something.
If I wanted to do a jigsaw, I'd play Tabletop Sim or go buy a puzzle. If I wanted to look at still images and canned animations of hentai, I'd just use Bing/Google and find something good. What's the point of the worst of both mixed together? Too much potential wasted.
Visuals:
The art is pretty amazing, especially the still images. However, that's about as far as it goes, as the animations look like the girls are having seizures or something. The developers really need to hire a proper animator, the ones in-game are just uncanny and weird. Also, the MC's dick size seems to change, a common problem with perspective in H games I've found. He goes from a three incher to a massive horse dick depending on how far away the scene is taking place, something that could be fixed rather easily and needs some cleaning up. Seriously, take some animation classes online, or hire someone, these art assets are far too nice to be just shaking around like an
old Flash game or marionette cutout. Characters blinking, for example, look like their whole face is collapsing.
My big art complaints from a purely aesthetic point of view would be the girl having jagged, horrible teeth for no reason (she's not a monster or vampire as far as I can tell, her teeth look like they were filed down or something gross). Also, the monster/dark girls in the game are just a turn off for me more than anything. Might float someone else's boat, but they just don't hold up to the other girls.
Sound:
The music is nice, and the little voiceovers from the characters are done fairly well. I only wish there were more of them, or unique music for each stage or something.
Overall, avoid unless you just really like the art, and even then I'd just cheat. Don't buy it until some things are fixed and more content is added. I fear the devs will just continue adding girls instead of adding more content for the existing ones, and won't fix any of the gameplay bugs.