This update includes the following:

• Revised how puzzle sets are unlocked.  Instead of needing to complete all levels in a given puzzle set to open the next puzzle set, the player only needs to acquire 15 stars.  This will allows players who are stuck on a level to play on to other puzzle sets.  The stars to unlock a puzzle set are accumulated across all puzzle sets, so acquiring all 30 stars in puzzle set 1 will unlock puzzle set 2 and 3.
• Added message to level menu to indicate how many stars are needed to open the next puzzle set.
• Adjusted the star tiers on a few levels in puzzle set 1 to provide slightly easier achievement.
• Changed the movable walls to look like the other tiles, so it was clearer to the player that they can move versus walls that are permanently positioned.  To also help with that clarity, adjusted the overall visual effect of the permanent walls.
• Revised level 6-7 as it included chains on items before they were introduced.