This is amazing and hilarious! Could you tell us a bit more about the process? Did you build this on your own? What did you use to make it run on so many platforms - Unity?
All built on my own, with some music help from a friend of mine. Used Unity for ability to easily hit Windows, Mac and Linux. I'll probably get around to porting it to iOS and Android next year too, since feedback has been so strong on Steam, and there's a definite impulse-buy aspect to having lots of colourful cats riding around on trains.