The contestants start on a raft at the top of a slope, which is then pushed down and into the water below.
When they've hit the water, the contestants have to keep their balance on top as it glides over the lake to a slippery slope. At the top of this slope is a belfry.

Once at the slope the contestants have to run up it to try and get into this belfry.
If they can manage this they ring the bell inside to signify that they've won the game. But if a contestant falls into the water at any time they're out.