It's super super impressive if you managed to crank this out in a week - outstanding job. It reminded me very much of a game thats on my Steam Wishlist called 'The Final Station' - check it out if you haven't already been inspired by it because its very much in the same vain as what you seem to be going for here. I loved the train mechanic and the need to collect and spend fuel to get to destinations to raid (outstanding). I enjoyed the mechanic of only being able to be outside of the train for a certain time. I think I would have appreciated some kind of gun or weapon to kill those big ugly things as in some building it was really hard to move around without taking damage. Overall I loved it and thought the ambiance was outstanding. Just a great great job -well done.
Edit: One thing I did notice was that my water and food requirements continued to decrease while I tried to read the notes, so I basically instaclosed that and didnt really pay any attention to it. I reckon it would be good to pause the gameplay while that note is up and then just resume time when you click out of it.