Cool game!!
Really liked how you fully implemented both theme and limitation here, the idea seems very original to me. I was a bit confused during the first seconds, but that feeling of discovering your own goal is neat. The night train atmosphere is also well achieved. It was enjoyable to discover the mechanics of the game, and also trying to have every need satisfied. The game feels very complete, even including a tutorial! It is a considerable quantity of content to be done in just 3 days :)
All in all, a great job!