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 |