What could have been a pretty decent game is held down by inconsistent AI, bugs and being cryptic or even actively misleading at times.
The main enemy 'Aka Manto' will often just walk past you or even straight through you without noticing you. which diminishes what horror the game had going for it. but, that is not the worst of it.
at one point you need to get a girl some food so she will let you onto the roof. you head to cafeteria and find a vending machine. you pop in a coin and without letting you pick what you get, out comes a healing item. i assume "oh, this vending machine is for healing items." and elsewhere in the cafeteria you find a ticket operated food machine. i thought "i need a food ticket"
this is not the case as despite being intractable, the food machine is decorative and nothing more. you actually have to give the aforementioned vending machine 2 more coins to get the food.
I spent maybe an hour trying to figure out what to do only to find this out. i then decided to quit.
with some updates the game could be much improved, but seeing as the game is 4 years old i doubt that will happen.