I loved the first three acts of this game. I found them surprising and inventive, yet intuitive. Focusing on those levels, the game offered exactly what I love in a puzzle platformer. Unfortunately, I found the last world to be the most frustrating, which meant I ended the game with that feeling lingering. The puzzles in the last bit were suddenly obtuse and frustrating, and that contrasted sharply with the rest of the game. It may be I was in too much of a rush and missed some obvious signposts, but I was letdown after such a strong opening.