Only the most ardent bubble popping fans will attempt to complete each Story Mode level with a full 3 star rating. Here are a handful of tips for those willing to brave that challenge. Most levels in Story Mode come with a hard bubble limit. When you complete these levels, you’re actually awarded bonus points for each leftover bubble. The lesson here is simple: beat levels in as few shots as possible to score the most points. A similar principle applies to levels with a time limit: beat the level as quickly as possible to rack up the bonus points.