I don't know, maybe Dan was down on this game because he'd seen it all before in Canvas Curse (which I also haven't played) but I have nothing but good things to say about this game.
I thought the underwater boss was a great way to mix things up, as you had to invert your thinking when drawing lines.
My only complaint is that Kirby's end-of-level dance isn't up to the series' standard. He just rolls about in time to the music. I expect more.