Not on par with the rest of the WarioWare series.
One great aspect of WarioWare for the Game Boy is that the controls are simple, solid and easy. In WarioWare: Smooth Moves, you spend the whole time waving your arms trying to get the Wii sensor to pick up your movements. The beginning stage of a game should be easy, especially in a game like WarioWare. So why am I failing to complete the first stage in this one? With all the crazy movements you have to do in this game, you would think Nintendo would have tested them out first. Apparently, they did not test them enough.
Like all WarioWare games, Smooth Moves gets fun after a while, and when you've finally figured out all the controls, it gets much easier. But, WarioWare games should be accessible to anybody picking it up for the first time, and this game sadly is not. While Smooth Moves is still a pretty fun game, most of the Warioware charm is lost due to sometimes impossible controls.