They add several quests and music tracks, but no major gameplay changes. (microtransaction.zone)
The game comes packed with several quests that involve these bears, which includes taking down five of them (and that isn't an easy task). (digitalchumps.com)
After the tutorial, the player is given several quests that direct gameplay toward accumulating materials, building structures, or purchasing decorations and placing them. (en.wikipedia.org)