Graphics: 4.5/5 Awesome to look at. The game is extremely colorful, and the water effects are nice too. The only problem is that since the game features auto-save, it hiccups now and then, but other than that, very good looking game.
Sound: 4.5/5 Not only does the game look great, it sounds fantastic too. Everything does - the voiceovers, the pinatas, and all the random sounds in the background. Sounds sweet.
Control: 4.25/5 May take awhile to get used to, say a half hour, but for kids it may take awhile. However, there are two control types. Viva Pinata controls nicely.
Fun: 4.5/5 Viva Pinata is a very fun and surprisingly deep game. You get garden upgrades to get your garden bigger, the pinatas only enter your garden under certain requirements, you can hire people to take care of your garden, and intruders can even make your pinatas sick. This game is just a lot of fun, but it's flawed. The game takes a lot of patience, and sometimes pinatas will eat other pinatas when you really don't want them too. Viva Pinata is definitely said to be a stupid little kid's game, but it's such a good game, you can't pass it up. Definitely a game that's looked over way too much.
Achievement Difficulty: 4/10
People say the achievements for this game are an absolute sinch, but it really isn't that way. The achievements will come easily only after 5 hours or so into the game when you really start rolling. Before that though, you'll only be able to get a couple. But even so, this is a game that's so fun to play you won't even care if you get many achievements for. It's just a blast to play.