For most of this game the puzzles are so easy that it's basically a walking simulator, and you spend most of your time trying to find hidden collectibles for no reason. Towards the end the game starts to challenge you with clunkily placing triangles in very specific angles which require extensive trial & error-ing. And all of this drags on for way too long for its own good.
The best part about this game is the combat against regular enemies. The bossfights were disappointingly easy, and the secrets to discover are unreasonably complex and will leave you finishing the game and feeling like you missed a large part of it and don't want to go back.