In the sewers, I got the wheel died and reloaded and the wheel was neither in my inventory nor where it should have been in the reloaded save.
In the school, the library door is interactable but doesn't display it (i.e. doesn't tell me to press e).
It's still being worked on, the newer updates are on Patreon though
I just replayed it after a while and I'm still sat here thinking that a sequel is just a must. Nevertheless, it was so good that even if the next VN is not a sequel to Alpha Underground, I'm getting it
