Created this account just to tell you this
I really enjoyed this game, especially the fact that the antagonist's behavior is much more complex than I originally expected. I'll be looking forward to the next update.
There are, howerver, a couple of bugs I managed to discover.
First off, the girl cannot pathfind her way out of between 2 chairs in the dining room (as long as you're on the opposite side of the table);
Secondly, she can softlock herself near this particular desk in the B-1 classroom. This completely breaks the game since she is simply unable to continue patrolling, which lets you explore the entire building without having to worry about her at all! However, she managed to run out of this softlock the moment I started taunting her and running around the hallways.
Thirdly, while some keys do have a glowing yellow aura, some other keys completely lack it. This really threw me off since I expected all the keys to be glowing in the dark, so I struggled to find 2 remaining keys which were not glowing for at least 40 minutes...
Anyway, I thought these keys would start glowing if I played with the lightswitches in the classrooms, but that didn't work. They still refused to glow.
This is the key with the lights ON,
And the same key, with the lights OFF;
Another thing, when I won the game, the girl still continued chasing after me (she did not attack, however). Im not sure if this is intentional or not, but I though it would be important to let you know just in case.
And another thing, I've discovered the most reliable way to check wherever or not the girl is right behind you without any risk of taking damage. All you have to do is go to anycorridor and position yourself near the window light. This makes it incredibly easy to spot her shadow (which is absolutely terrifying, I love this design choice.)
But it does have a bit of a "problem" since your player character does NOT have any shadow. The only thing you can cast a shadow with is with a key in your hand, which leads to some derpy situations like this:
As you can see, you can reliably check for the girl right behind you with this method. And this scene WOULD'VE been incredibly scary if not for the funny floating keys right next to her. This is not really a bug, but it does however kind of ruin the atmosphere I guess.
Speaking of the stalking-right-behind-your-back mechanic of the antagonist, I've discovered a way to "break" her AI for solid 5 seconds when she is doing that. All you have to do is get close to any door, close it and simultaniously go into the door right before it closes. Not only does the closing door push the girl away from your back, but it also gives you a big window of opportunity to make your escape while she is calculating her next move with her face glued to the door.
And lastly, I've discovered you can win the game while knowing only 3 numbers from the code instead of all 4. All you have to do is bruteforce the code by trying out all the possible combinations with the last unknown number ranging from 0 to 9. Once again, I'm not sure if this is unintentional, but that did make the game a bit easier for me.
Anyway, that's all I have to report. Thank you for creating this game and psychologically scarring me for the rest of my life. I won't be able to look at cute anime girls the way I used to ever again...