TL;DR: This game is the definition of shovelware-made-for-mobile-hidden-object-game trash. And if youre looking for a Match-3 RPG DO NOT look here!
Ok, so the tags are misleading. This is mostly a fantasy themed HOG (Hidden Object game), not a match 3 RPG like Puzzle Quest.
It has a tiny "match 3" component, if you can call it that. Basically, youre trying to draw a path from a start point to a finish point by breaking the "rock" by linking gems, which breaks the background "rock" and creates an open path. You select gems by dragging over them with a mouse. In any direction, including turning while dragging. Its so easy it isnt even funny. It goes HOG scene, where you have to find the pieces of various items in a picture, then use the items in the picture to open more scenes (IE a pickaxe to break a cave in). That gets you a key to open a book.
Then a few rounds of the aforementioned match 3. THEN a "find the differences between two images" HOG. You do that a few times in each book before going back to the "find pieces of items HOG" to get the new key to open a new book.
Theres no choice, no choosing of puzzles, and a very weak fantasy plot with an annoying fairy that constantly flits around the screen. Its like its badly built for 5 year olds. If you like HOGs (oh god, why??) theres WAY better ones out there. And if you like Match 3 RPGs theres way way better ones.
This MAY entertain a 6 year old. But I doubt it. Do yourself a favor and dont waste your cash.