I love a good wooden train puzzle. This one was a little tricky, especially with the train going right away. At first, I thought I would have enough pieces to make the whole connection before the train started. There was a lot of clicking: letting the train go over a section, clicking on it, going back to its destination, and spawning it again.
It was fun, though. It would be great if you actually had to get the train to follow the path rather than just hitting the building at the end, and perhaps preventing tracks from being laid on top of each other. But those are minor things; it is a fun little puzzle game. Keep it up!