- Earn your first money by pressing a "Y" button. - Increase your income by buying new elements of Windmill Engine like sails, rails, wheels. - Use a Millstone to upgrade all your engine parts. - Oil decreases your engine phase and your windmill will earn more money every second. - Learn new technologies to open Gristmill, Oil mill and Sugar mill. - Beware of breakdowns! Breakdowns will decrease your income money every second. Build a full Windmill Engine and earn a billion dollars!