The engine rotates the cogwheel attached even when the game is closed. You can add engine upgrades to make it spin the cogwheel faster.
| Level | Cost | Effect |
|---|---|---|
| 1 | +1 Engine | |
| 2 | +1 Engine | |
| 3 | +1 Engine | |
| 4 | +1 Engine | |
| 5 | +1 Engine | |
| 6 | +1 Engine | |
| 7 | +1 Engine | |
| 8 | +1 Engine | |
| 9 | +1 Engine | |
| 10 | +1 Engine |
Workshop
Engine & Engine Upgrade • Cogwheel & Big Cogwheel •
Hammer & Hammer Upgrade • Money Machine Upgrade & Interest Rate •
Balloon Pump & Balloon Pump Upgrade & Balloon Speed •
Portal & Portal Amplifier & Charger Upgrade •
Mine • Selling Detail
Clockwork City
House & Tavern & Building Upgrade • Planet & Planet Upgrade •
Tower • Windmill & Bellow & Bellow Upgrade • Propeller •
Tax Collector & Tax Collector Upgrade • Crystal & Crystal Upgrade