I like the theme, it's drawn well, could use some logic to how where they need to go, just so they can't get the same thing twice in a row. had one of em use the bathroom 5 times like damn you good man?
I think the main issue is there's no way to really speed up. maybe if you can click in rhythm to keep the train moving at full speed while you're down a guy? would add some complexity since you'd have to watch the other guy and try to keep up with the train instead of just waiting.
cool game though