The game and the idea itself looks promising and great. I really like the concept of the train, it felt so cool to play it. There are some bugs that prevents me to enjoy it to its fullest. The web player made my browser freeze and the water carriage somehow got separated from the locomotive. Other than that, the art style is great, the ideas of the control (speed, directions etc) are really good idea. Although directions didn't work all the time. And the brush idea added some tensions.
it was a nice idea that I wish could be more expanded. But overall it's a great thing to see it work as is :) well done