When other birds are flying among pipes, lovebird is still waiting with a half-filled heart in their hands. Lovebird has wings, but it cannot fly until it meets another lovebird with a matching heart. Swipe your finger left, right, up or down to guide lovebirds to walk. They won't stop until they hit walls or collide with each other. After lovebirds find their true love, a heart will leave on board. Merge hearts to level them up. The higher the level, the higher the score. You can sacrifice a level of heart to help change the surrounding hearts to their matching hearts.