Nice, simple game. I liked the art for the enemies and there's something really satisfying about the way the light from the flashlight looks against the background. I think it would be nice to have some more sounds and/or visual elements to give feedback about the different interactions the player has. Stuff like how much charge your flashlight has, enemy spawns, how much time is left, stress level (I know there's a bar but it would be cool if you could hear your heartbeat or something).
I found two bugs, not at all game-breaking, just little things. First, you can actually click on the stress bar and move it around. It seems to reset itself after a second or two and I don't think it has any impact on gameplay but it confused me on my first run because I thought it was an interactable UI element. Second, there seemed to be a delay during the stress minigame with my mouse input. I was playing in Firefox on Windows, not sure if there's the same issue in other browsers or in the downloadable version.
Great job overall! Really great atmosphere.