Several campaigns were updated today under Mazes, Spinners, and Geometrics. The early stages continue to evolve as we tune them based on player metrics. In general, the earlier stages are now slower and static barriers were removed.
There was also a bug fix for the Campaign Selection screen where the preview levels were not updating correctly in some situations.
Try some of the intermediate and harder levels. That's where the play styles start to combine in new and fun ways.