*starts game* - looks cute.
*train appear* -reroute them? ok cool.
*another train appears* -ook this is getting hectic.
*trains crash* -... allright, lets do it again.
*starts again* -clickety click click...
*reroutes a train back to tunnel*
*train leaves the tracks and goes off page* -huh, that is a neat way to dispose of them..?
*the train loops back into the page, and creates a chain of crashes*
...
10/10 would send the train out of bounds again.