This event has no time limit.
After the player completes level 29, this event will be unlocked.
Collect Stars to get a sweet reward!
The prize is one of any booster for 7 stars collected at the first time of this event. Remember one thing that only new stars collected on a level will be counted. After collecting all stars, they will continue to collect 7 stars and still collecting (There are some cases that the player needs to collect 10 stars). The reward is different in each stage.