Personally I believe that it's all a wasted potential.
The first idea - the "run away from a yandere at school" - was promising, had an interesting gameplay, and it was actually scary due to how well Saiko's AI worked for it's time.
But then updates stopped, despite of how people already bought it, without receiving the end product.
Adding another character could be good if executed in the first idea. Changing locations absolutely destroyed the whole premise of what we thought we're going into. Her being a zombie changes the whole idea and reshaped it - in my opinion - into a worse version of what we could've got.
If an author is reading this - I expect to get a full version of the game I purchased, which is "Saiko no Sutoka", at which I'm trying to run away from a psycho killer. Not run around in a forest.
Disappointing.