You place workers on giant interlocking plastic gears. As the gears physically turn each round your workers advance to better action spaces. You have to think several turns ahead to pull off a big move. Timing when to jump off the wheel is the core of this brain burner. It provides a nice balance of luck and strategy without feeling unfair. You will definitely want to try a different strategy on your second playthrough. The rulebook is actually pretty solid so learning it is not a headache.