The Daily Bonus is a reward for simply opening the game every day! Each day you can pop a pig and earn a reward. Reach the top on Day 7 and pop the boss pig, and you will receive a random extra-special reward, such as unlimited lives for an hour or a ticket for the Daily Quest!
In order to climb the tower, you must login on consecutive days. If you miss a day, you will be sent back to the bottom of the tower, and need to start your climb over from Day 1!