He knows how to design machines and mechanisms, but he does not know how to make money. Use his inventions to become a millionaire and start with the most primitive device. Click on it, making the gears rotate, in the upper left corner you will see how the money starts to arrive. Add details and knots, buying them for earned coins. This will make the machine run faster and more efficiently. Improve the device, and when there is a substantial income, you can think about buying new premises. Watch for upgrades, do not let the machines stagnate.