Great use of the theme! Love the replayability with the star rating system. I was motivated to improve most of the levels to get better times. It's a small detail, but I like the transitions you do like stepping into the train from the main menu for the level select. I'm curious how you managed to force fullscreen with your webgl build. Fullscreen seems like the best way to play webgl games, so this seems like the ideal way to do things, I'll have to look into it.
Anyway, awesome submission! :)