OK here's a quick screeny. The game has instructions from the highscore table but basically you click 2 adjacent tiles to make 3 in a row. Every 3 in a row creates points and the 3 tiles disappear with new tiles dropping down to take their place a la Tetris.
As the levels progress the number of tiles increases making it more difficult. Along the way you can earn shuffles so that you can shuffle a difficult grid.
Does any of this make sense? It's much harder to explain than it is to play
Translation: Feng=more money, Shui=than sense.