This was enjoyable! The atmosphere was great, it kept me on edge and didn't overstay it's welcome. Great job, and I'll be keeping an eye out for your future work!
My only question is: how's the title supposed to relate to the game? I can't seem to link Hell on earth to the game, nor can I link some sort of plague to it?
But if that's the only issue I have, you're doing something right. Great work and keep it up!