Run, sheep, run!
This is not advergame, it’s an educational game (edugame?) I found on the BBC Science & Nature site. Sheep Dash! is simply a gimmick to test your reaction times and explain you how a cup of tea or coffee can affect your performance.
It’s simple game, but it’s very addictive and extremely viral. A good example to bear in mind when thinking about a viral game.
BTW, I’m a bobbing bobcat…