Move species of the same color type, Up and down more than three can be spliced into the flock, put them in front frontier and then bodys will be burning in flame, sliding them along the route, the birds were rushed shock enemies.
Multi collection of bird flocks, attack power will be more vigorous. After Knock ing down zombies ,battlefield will leave the coins, remember to collect, It is buying props capital. The rational use of props is a prerequisite for clearance.
With the upgrade of the battlefield, the props will be more expensive, hoarding props to emergencies.
Dear players, with angry loving birds together to defeat the zombies !