Massively fun! I loved the different uses for the hook shot, and especially enjoyed sending it offscreen to see what zaniness would ensue. The puzzles have quite a variety, and the action is pretty solid. I could not always pull off the hook-enemy-and-roll move, I'm not sure why that is.
Also, a very minor quibble: the mushrooms (flowers?) have a strong defined outline and look like obstacles, even though they are not.