Game has four core pieces pointing in four different directions. Tapping on a core piece destroys the piece and piece to which the tapped piece points to. This forms a chain and the chain continues till the last piece points back to the chain or to the side or to a blank tile or to an obstacle.
You should tap to form the longest chain possible as it creates powerful power-ups such as birds which can fly to smart targets. A quad-directional piece can trigger chain reaction in four directions. When two power-ups are next to each other, tapping on one of them creates powerful combinations.
You can win levels by destroying the pieces, creating power-ups, destroying obstacles and collecting items.