The good Puzzle Retreat was updated recently, adding a new tile: the bonsai tree. They start as small plants, like these
and when and ice block lands on them, they grow to large trees, which cannot be crossed by ice blocks.
But the most interesting thing about this update is that the old puzzle packs have been rearranged and, as a result of this, all packs (except for the new "Garden") were unlocked for free.
So it looks like there are plenty of reasons to update to the latest version :-)
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