One necessary skill when developing a game based on such vivid source material is restraint, especially on a powerful console. Up: The Video Game skims through much of the film's plot in cut-scenes, done in the grainy, black-and-white newsreel style that was also used to depict the exploits of Charles Muntz and his dirigible, "The Spirit of Adventure." Cinematics in the game look a bit underdesigned, considering the capabilities of Xbox 360. Fluid and brief, these cut scenes don't do much more than introduce important story events, or cap off big boss battles. The graphics during gameplay almost look better, albeit reduced in size, than the cinematics. Which is fine, since you'll spend much more time exploring with Carl and Russell than watching cinematics.
Additional touches that help make Up: The Video Game lots of fun are creative use of sound effects (Carl's hearing aid and Russell's bugle) and spoken dialogue from all characters, including even incidental NPCs like Alpha. The camera is reasonably intelligent, but occasionally leaves you in a lurch when two players are trying to explore different areas of the screen. Multiplayer Mode explores the flying mechanic introduced early during the main story, and does a pretty good job of creating good arcade dogfighting action. The greatest testimony to success in the game's design is how well it all holds together and feels connected to the look-and-feel of the film.