I'm giving this game a solid 5/5 because I was pleasantly surprised by how well-made it is. Let me start off by saying: there isn't that much sexual content in the game as of v0.3.0. If you're looking for a quick fap, this may not be it.
However if you keep playing, it's evident that the dev has made up for it in every other aspect. There's an incredible amount of polish that has clearly gone in to the game - animations are well-made, there's no clipping, no bugs (that I know of at least), no janky combat, no getting stuck or falling through the floor due to shitty collision hitboxes - you get the point.
On top of that, the pacing is great, and despite having a fairly simple story, the way the story is gradually revealed to you rather than being spoonfed (except for that one time the scientist lady dumps exposition on you).
The map design is also very well-crafted, with decent puzzles and minigames (such as the repair minigame), and while not all doors are initially available to you, they always eventually tie back in through shortcuts that you unlock later.
Sound design is simple but great too, with appropriate ambience and enough environmental noises (lights flickering, doors slamming, damaged wires sparking etc).
If I had to suggest some improvements, there would be just two:
1. Proofreading for some minor spelling errors, but that's just me nitpicking. (e.g. "Discription" instead of "description", "complited" instead of "completed".)
2. More variety in the sexual scenes, even for existing enemies. Currently the only way to see the tentacle scenes is to let yourself get infected by the enemies. This takes up time because you have to go out of your way to get infected, then after the scene is done you need to find a shower to wash it off and continue. I think it would give players more incentive to go through that process if there were different variations of the same scenes to see.
All in all, it's a really solid game and it's impressive that it was made by a single dev, so kudos to Kodman on that. I can't recommend it enough, and hopefully more people give it a try, as well as support the dev!