I think I understand what you are trying to say, I agree a stamina gauge or faster zombies would make the game a lot harder and fun. From my experience of making jam games is to make games easy as most people just want to finish the game ASAP and move onto the next one, so I decided to make the gameplay much easier but I personally like games in which enemies are harder to kill with more responsive inputs and decision making as you mentioned. Thank you for playing and providing insightful feedback!