Bug report: In the cafeteria when you have to sneak up on Yuri and take the key from her, Nothing actually happens. I have successfully snuck behind her on the next tile and pushed every button, but rather than get a key Yuri's sprite will just glitch out for a second and continue walking, the game is not passable beyond this point. This is on the complete paid version mind you.
First of all, thank you for purchasing the full version of the game.
You are playing on easy difficulty, right? It seems I made a mistake that only appears in the easy mode of the game. I will fix it right away and post an update. I apologize for this mistake. If you want to continue playing now, I recommend starting a new game on normal difficulty, the difficulty doesn't really increase much, and you will be able to play that game without this problem. If not, please wait for me to post the new version, I shouldn't take long.