I'm amazed there are no reviews of this yet. Probably because everyone and their mothers know about the game already (Damn Mothers can't knock before coming in late at night, amirite?)
This game is the product of a bygone era of indie game making. I'll give props where props are due, the art is fairly well drawn (the sprites, more like) and there's a wide variety of fetishes. The OC they introduced, a frigging Sonic OC, is actually drawn on point and meshes well with the rest of the crew... Though they couldn't help themselves but make her the OP character anyway...
Now, why 2 stars? The game is simply not good. It's outdated. It uses an old engine with laughable resolution for this day and age. The sound effects sound as if they had been recorded with pre-smartphone era phones, the menus are difficult to navigate, there's no mouse support, there are a ton of options that can't be used.
And as for the gameplay part of this video game: It is needlessly infuriating. Your character's attacks have very limited reach and they hit only on the plane that you are on (give or take a few centimetres up and down, but barely noticeable.) The enemy AI, particularly in the Halloween level, loves to exploit this by approaching from above or below while you are trying to step away to get in position to hit them. If the enemy touches you, you have a split second to press a button and escape (provided you have stamina) but sometimes the game likes to load something or lags when this happens, so you press the button and nothing happens, only to be prompted a moment later, and you can't react fast enough. (Also, fuck that boss that disables your escape button. That is peak shit game design.)
Lastly, what we're all here for, the pron! It's...... alright? You will only get your kicks out of this if you are into a LOT of stuff. For many players, there will be several enemies whose attacks will be turn offs, and it takes only one or two kinks one isn't into to lose one's mood. Lastly, I understand the gallery is still a mess (I'll admit I haven't played v7.8, only 7.4 and you need several playthroughs to unlock some things, which is mental.)
TL;DR: The game is old and it shows. Don't expect the developers to improve anything about it judging their track record. I'd say, if you are interested, download it with a save file and check it out. It can be fun for an hour or two if you have never played it before. But frustration will eventually pile up, don't say I didn't warn you.