Cutesy art, simple mechanics, and its origins as a mobile title will lull people into thinking this is an easy game. And while it may be easy to play, it is incredibly hard to net high scores in the game.
You have a basic grid on which a randomized series of items are situated, the items you place are randomized. You must link together at least three items of a kind in a vertical or horizontal chain, these chains can zig-zag and connect together a great many items, merging them into the next item up in quality of the same item base. The three base unit types you have are Rocks, Bears, and Plants. These three base units cannot be merged together, this leads to a conflict in placing each item as you must try to set up future placements without any foreknowledge of items to come,
The puzzle element itself is enjoyable and challenging, it will function as an enjoyable time sink if you let it. There is also an external element of resource collection and island build up. This is all to obtain game altering items which can allow you to place whatever you need whenever you need it in a pinch - generally not worth doing until you have a great many of them and are going to attempt a long game.
It is fun, but it is frustrating how you can often end up with a string of items you don't want which will end up killing you.