Great idea!
Trains always get my attention :)
Visual style is very pleasing. This is an easy choice for cosy playing while commuting. This can also very easily be seen as educational also.
I hope on-going development will be considered. This is a good idea you have and your team pulled it off fast.
Visually = Solidly pleasing. You have a good foundation to work from.
Audio = Always a tricky one to pull off at this level. For future game-jams, sticking to a simple ambience will also work when you have very little time.
Very impressed. Well done!