Cute little game where you can create green landscapes. As others have already pointed out it is certainly short, though, not not very challenging at default setting. Would, in consequence, only buy it it low price.
The game could have been nice but is too monotonous in general:
Ride your train. Stop to collect resources. Stop for combat. Upgrade/repair your train.
Repeat.
And it would be nice if your soldiers would not happily take a bullet while their enemies run for cover all be themselves.