Good game. The author's understanding of wind power is backwards. Would be a better story if there was an earthquake, and you need to repair the underground system in order to restore motion to the underground generators and power to the town.
***SPOILERS*** Level 8: Push the cart to the block. Load the block onto the cart. Push the cart all the way to the right so the block slides OVER the rock. Use the block to jump into the blades of the windmill.
Level 11 is ridiculous!!! Send 3 guys running and I have to accurately shoot them ALL in the head before they get to my guys?!?! Also, 2 ways to get to guy number 2 is evil.