Reminds me a lot of fnaf 2 and similar games. I could see this, with a little polish, being a cool game.
Here is a suggestion: have the player have health, and when suspicion gets filled instead of having it be a game over, have there be some sort of jumpscare and lose some of the health. Makes the game more forgiving while sticking to its principles. If you want to keep the difficulty you could have the masked folks hide in the background so that the player has to try to keep an eye out for them and figure out why their suspicion bar is rising (and find the right mask!)