Thank you for the response and explanation! :)
I know there's a lot of rushing to get things working in the strict time constraints, so it's perfectly understandable to have these sorts of issues get put into the 'final' build.
I feel there's a lot of potential for this post-apocalyptic survivor game if it was developed further. If there was more of a progression system, for example ways to upgrade the truck and/or reduce water/food consumption and/or increase the amount of time the player can spend in the radiation; things like that would make for a very compelling experience. Naturally fitting any of that in the time frame of ten days is asking for trouble. :)