In a distant place, there's a beautiful little village. Let's bring the light to the village by connecting gears to transfer energy from windmills.
All you have to do is pick up appropriate gears and pin them to the axles so that we can transfer the energy from the mill to the village.
Gears have 5 sizes (from 1 to 5). Beside available gears, you can make your own gear. Using this function by selecting icon resembling the hammer.
For touch devices:
Tap on the gear and drag it to the axle.
To remove the gear from the axle, drag it out of the axle.
For non-touch devices:
To select the gear, move the cursor to the position of gear and press 5. Then move the cursor to the axle and press 5.