Tap the row where you want to place a piece, and the piece will drop down to the bottom of that row and be placed there.
The first player to get four pieces in a row vertically, horizontally, or diagonally wins.
There is no background music or sound effects, so you can enjoy the game without worrying about volume or silent mode settings.
An offline player-versus-player mode is also available, so you can play against friends and family.