The train looks right at home for a kids game, the backdrop does let it down a little though, the angle of the rails and solid grass color make the background appear really close and flat. Great job with the text, so easy to read with no dithering!

The game is about moving the train from station to station transporting mail and passengers. Hence the icons in the lower right corner..

It is nice, but I think you could add some more details to the background to make it better.

what about the shape of men x 30? is it a kiddies game about running over people who are bound to the rails?

Nice idea.  I like the feel of this.