Of course, being on the Wii, players expect some content usability dedicated to using the capabilities of the Wii-mote.
Up: The Video Game does cater to this a bit, with players having to make a sawing motion at times to cut through ropes or lower the Wii-mote to mimic Carl lowering his cane to pull Russell up a wall. These are simple, but effective uses of the motion sensitivity, but overall felt somewhat limited. Other interactive moments were also glossed over, as is evidenced when our pair of adventurers are attacked by the dogs. These scenes play out by the player watching and waiting for the dog to charge, then hitting a button. Rinse, repeat. Later levels include more and more of these "moments" and the newness wears off very quickly. Speaking of dog-fights, there are several levels that involve Dug flying the plane, engaging in aerial combat (dog-fights). These levels are enjoyable and, in my opinion, a bit better conceived and implemented that the other aspects of the game. The few boss-fights scattered throughout the game are also fairly well thought out, and while not much of a challenge for a single player, are still better enjoyed in cooperative play.
All said, Up had a tremendous amount going for it, but the end result feels rushed and only half-heartedly created. The single-player (cooperative) story is fun, especially for those that have seen the movie, and the characters are well acted, offering a few quips that actually caused me to laugh out loud. The multiplayer mode feels more like tack-on fluff than a substantial addition. For those considering purchasing this game, I would strongly suggest taking a trip to the local store and renting a copy first. With a playtime under three hours, it is hard to recommend buying this game, even for younger players.