Got stuck on the loot box thinking that it was just an item i would pick up or briefly interact with, but I didn't find the code beforehand and couldn't back out so i had to look up the answer in order to continue playing the game, not sure if that was intentional or not but that is definitely a game-breaking problem. Coffee mug puzzle was poorly done, the pieces would frequently not track properly, maybe would be better in the non-web version but the web version is what I'm critiquing.
The animated sex scene at the end is the only one in the game, which is not worth the time spent in my opinion. The scene itself isn't bad, but calling it interactive as a selling point seems disingenuous when the only interaction is buttons on the side for speed and finish. Again i'm not sure if it's an issue with the web version or if it's across the board, but the animation seemed pretty lacking. I know it's hard to animate at a very high level, but the animation was like 4 or 5 frames of movement.
Generally an erotic visual novel has 1) lots of good art/frames that change throughout the entire novel, 2) A long and engaging story with choices that change the outcome or dialogue in meaningful ways, or 3) both and that would be in addition to whatever end-game reward scene. I get that the visual-novel genre is mostly just clicking next; but usually the story has more thought, or decisions that the character makes are more relevant, in this one, it really seems to be basically a single fork in the road with almost no other decisions being relevant at all. MC and voir work together, they get in a car crash, MC tries to get her memories back using items from their lab, they fuck. There's no twist, there's no background story to learn about on the side (maybe some more compelling info/sidestory when you collect the items around the lab would be a step in the right direction. I know there was sort of an intro backstory with the whole driving in the car thing; but I basically learned nothing about either character throughout the game that wasn't apparent within the first minute of dialogue.
Basically this game seems unfinished; I assume that it was intended to be a full release game, but it has the same quality and quantity of the average game demo. There is potential, but it needs more to it. +1 for music, good choice.