I prefer the Lost Levels than this game. I literally hated the level design in the first worlds. WHAT WAS THAT WORLD 2 to WORLD 3. the difficutly wasn´t balanced. Why the world 6 is easier than the first worlds. this game lacks level design and reuses a lot of musics. some bosses are unfair as hell. specially the last ones that require a lot of very good timing. The game is frustating sometimes so please if you want to have a life don´t play it.