The rotating maze puzzle in Act 4 can be solved by guiding the light orb toward the various mazes in the rotating device.
The turning node puzzle is an Act 3 puzzle that you can solve by connecting the nodes to each other.
The Krang is the final boss in the game which has several phases that you need to overcome in order to beat it.
The flower puzzle is one of the challenging puzzles in SCORN which you can solve by aligning the four dots in the alien mechanism.