And in terms of points to hit, Merge Cats: Catopia Puzzle certainly strikes a lot of chords. Merge puzzles? In Merge Cats, you're all set to explore the world of Catopia while accompanied by your guide, Cheshire. The only way to track them down is to leap into some merge puzzles to help light the way back home. As far as gameplay goes, Merge Cats is pretty self-explanatory.