I feel only W and D are working in the WASD. I can S while Ding, but Sing on a full stop has the character not move.
The searching part doesn't feel like it's happening or isnt happening, there needs to be a response from the lockers telling me it's been searched and empty. As is, I just feel extreme paranoia as I have no clue if anything is happening (assisted by not finding the sacrifice at all. I'd even say I'd prefer an interact button even, or just a select the character and tell them to inspect a room [if that was the elaborate navigation system im so sorry])
As usual, your models are love, and with the char descriptions I can feel a "hmm how quaint. a mother of 24? I'd never touch her. It has to be milton." It has to be milton, right?
In concept feels very The Thing, and I quite like it. This can be a bit of a replayable game, or a small narrative game where you eventually sacrifice everyone (would require some writing bits I think, to flesh them out and make the deaths matter; 2026s mouthwashing?)