From the Press Release:

Red and green apples are placed on “crates” in one of eight rows at the top of an elevated game board. Apples away! By strategically moving apple crates and using Newton’s law of gravity, be first to get all of your apples to fall to the bottom row, while blocking your opponent’s apples. In the race for gravity to do its job, players move crates vertically or horizontally, and even line up crates to build bridges to move apples into new rows. Complete game rules are included along with the three dimensional, molded plastic game board, 8 apples and 16 apple crates.