I was hoping to rate this higher after spending some time on it. Sadly, I think this is the best I can do.
Graphics are nice, everything looks pretty okay. Unlike a previous reviewer, I'm not going to take anything off over one missing pixel on a pointless loading bar.
Sound, also pretty good, with one exception: The music doesn't loop. It just...ends. And it ceases playing until you finish your game. A bit odd, that, and a pretty severe oversight.
Control, oddly enough, is also an issue in some of the minigames. You're not told how to play many of the games, and they don't control like you would expect them to. Dragging the clouds is damn near impossible, cutting the tree makes zero sense...there's just some games that refuse to control well.
If I lose a game because I was bad at it? That's fine. If I lose a game because it controls like garbage? That's not fine. That's frustrating.
Gameplay, it's just like Wario Ware: Go though a bunch of minigames. Do good enough, you'll unlock more minigames, but here's the problem: The requirements for unlocking the extra games are just crazy.
Thanks to some of the minigames being near-impossible, getting more than a 1-star rating is quite a feat. It's also nice that you can pass a section, and still get zero stars, AKA EARNING NOTHING FOR SUCCEEDING.
Getting a perfect 3 star rating on anything beyond Tutorial is a nightmare. You lose just one game? You failed. Doesn't matter how well you do after the fact. If that cloud game pops up, I need to be lucky, more than skillful, to succeed.
I wish there was a way to practice the new minigames before they show up. Again, a lot of them are not explained, and I have to guess how, in 4 seconds, I'm supposed to play this game. Even though a lot of the games are simplistic, not all of them are.
Wario Ware's games tended to be super-simplistic. This took it up a notch, and as a whole, hurts the gameplay as a result. If some of your minigames are complex enough to frustrate someone who's trying to beat them in 4 seconds, something has went wrong.
It's not the worst game I've played, far from it. However, it has some questionable game design at points, which hurts the game as a whole.