The central mechanic of the game, the camera flash with the weak points, is really, *really* fun. The general aesthetic is really spooky and off-putting in a great way, and the audio design is great, especially the tone for when enemies come into range / spawn.
My complain comes down to a balance issue; the high speed of the enemies, the relative lack of ammo (and thus major punishment if you whiff shots), the low visibility, the loss of speed with the revolver out... in more cases or not, it leads to an unfairly oppressive experience, when you're flanked by a lot of cheap shots that you really don't have much chance to avoid. It becomes especially apparent a couple waves in; I feel like the solution is either ease up on the fog, or lower the speed of the enemies, but hitting a perfect balance there seems tough.
Oh, and a potential bug: Occasionally at point blank, the camera would just do nothing to an enemy if you were just backtracking. I don't know if you *need* to be hitting their side or something with the flash, but it definitely caused a bit of confusion.
As critical as I'm being though, I want to say I loved this game on a conceptual level. Seeing it polished up to a degree would be amazing, cause the mechanics at play here are really enjoyable.