This map is mostly based on the use of the Invisibility Powerup to avoid groups of better equipped enemies. Other than that, it's somewhat a mixture of things from the previous levels. There's this classic Giant Rock just below the starting point with nearly the same item layout as previously, an arrow maze with multiple switches and a Silver Pyramid maze with the "GooRoo" caption. Then there's the Tool management aspect and multiple Secrets, some required to complete the level. The use of Secret Switches was a bit more complex in this one however, as these don't only create a single passage through an obstacle but remove multiple layers of walls and edit the surrounding tiles properly, guiding the solver through with arrows. So good job on that. The level has parts where you need to think and not just do the basic actions like breaking rocks and digging holes, so that justifies its current difficulty rating.