Look, this is a lovely game and there's so much to appreciate about it. IMO levels like Ice Paradise, Music Zone, and Sky Sanctuary all looked absolutely amazing, and play amazingly (except for sky sanctuary, but you get used to it). The second half of the game is where things get really frustrating with the levels and boss fights just not being fun anymore and feeling pretty samey.
I really thought I'd love this game from everything I'd seen and heard about it and I do love playing the first few levels, but the rest for one reason or another just wasn't a fun time