Good luck with the game. I hope for a successful port to renpy. I didn't encounter any bug in Ms Marsh's "good" route, but when meeting her at the shop and trying to convince her to "exchange her bad habit for sex" the event repeated and afterwards the game froze with a gray screen and just the cursor was moving and no other reaction to key presses. So I gave up on trying the "bad girl" route.
Btw when I reached the "good" ending I thought I got the "bad"one for some reason. Sorry but it seemed like a cop-out. I didn't buy the explanation. As the two had plenty of time to discuss anything (it was said Mary visited her teacher until the end of the school year). And I used every available oportunity to spend time with Ms Marsh. At her last question about seeing her naked, I wasn't certain anymore, so I started from the beginning and there was no choice! And yes, if she is uncomfortable with others (mainly boys) looking at her, she could just be shy or have low confidence.
Smaller bra? Better support for her big breasts maybe. While trying to make them look smaller due to being shy(?). So I blame the writer for railroading the players. But the final scene was the final nail in the coffin for that route.
Maybe it was just a miscalculated attempt to force hypnosis into a more friendly route just because we're playing a hypnosis focused game.
Yes, I did pick all the good choices. So there was no indication that this could happen. It just came out of the blue. I was asking myself why not play the "bad girl" route when I get a bad end anyway? If the dev really wants it written this way, just have them go separate ways in the end. If it is meant to be a realistic take on their relationship. One with no future. Humans being irrational and flawed. Even that would be a better ending.
Sorry for possible spoilers. But I quite liked the game until that end. And will probably play again once the game has a new engine, pursuing other characters, as the erotic scenes were exciting and the story interesting with that mystery surrounding the mc.
End of rant.