Wonder is a pretty standard Mario game, albeit with a lot more creativity than the New Super Mario Bros. games allowed for. The level designs are largely just as good as those games' were, although I'd probably argue NSMBU had slightly better designed levels in general. The game adds to this with additional wonder effects in each level that change up the gameplay, which I think adds a lot to the game overall. Maybe some of the effects aren't as good as others, but I still enjoyed most of them. It's overall a pretty good game, although its complete departure in terms of aesthetic and gimmicks make it a little jarring coming from the NSMB games, which depending on what you thought about them might be a good thing. The whole 5th world sucks though.