Thank you. I understand the hunger and thirst, maybe next project if you make something similar you can have a starting stock of resources, so when you come back they are already scaled down. I would add a time/life bar for each of these required resources, so when you come back you can check each character and see how much they consumed in the time you spend out. Let's say 1 resource unit per second.
Also showing a timer during the platforming action to let you take decision better, so you know that the character X needs water or will die in 20 seconds, and in the level you can see the time going on, so you can have a more intense pressure on the players and give them the feeling of a "Though Choice". should I stay longer or come back and save at least character X and then repeating the level?
I understand time restrictions on the jam, but if you would like to complete this game or use a similar idea, I hope that the above suggestions would be useful for you.
You did well and I am sure next jam you will did better, maybe having a little bit less levels, but showing a more complete idea about the mechanics :-)