Thank you for your feedback! I was intending for you to use your guns and melee in combination as guns don't use stamina.
There is an audio cue for low stamina, but I think it may be too quiet. Overall not every run is meant to be viable at first until you get more gear and money.
but yes food and water is a bit scarce in the current balance. I agree.
Rest assured I will occasionally die on my first few runs also, it's an intended part of the game. There needs to always be a risk to lose due to bad luck to ensure the extraction mechanics work. (Extraction games are kind of like gambling lmao)
You also can build defenses to spread out the horde, giving you more time to efficiently kill or avoid the zombies. You are not meant to melee every zombie as that would be too easy (and probably boring.)
This is meant to be a challenging game akin to rogue likes, so you will eventually reach a point where food/stamina is not too much of an issue.
Thank you again, I will keep your feedback in mind for future updates. I hope you continue some more runs and get to see more of the game!