Ok. I saw your complaint, and I tried to fix this problem. I added the ability to shock a random enemy that is attacking you every 30 seconds. This way, if there are 2 or more enemies in the room, you can press the shock button to get rid of 1 of them. Thank you for your feedback!
Well, that's a start, but once you make it further into the night there's a possibility that all three show up simultaneously. At the point, even if you have the shock available, you're still screwed because you'll have two of them in the room. Obviously, whichever one you're not paying attention to ends up getting you.