The gameplay itself is split between two different kinds of games. The first is the adventure portion. Thats where you'll need to utilize all the capabilities your rat-form allows to move around the kitchen, snagging ingredients as you move about the environment. In order to get the ingredients gathered up, Remy the rat, who you play in the game, will need to dodge mousetraps and evade being seen. The level of awareness of the cooks in the kitchen is indicated by a bar that slowly rises as you maneuver around the level. If it gets too high, Remy will have to take some time hiding in a dark, quiet spot and wait for the heat to die down.
Once all those ingredients are collected together, the other part of the game comes alive. Thats where you take the ingredients you just collected and use the touch screen on the DS to perform all kinds of cooking-related tasks to get the ingredients ready to be made into a meal. Then, the actual task of cooking is performed, where you maintain temperatures under pots for the proper time to get the food made. Then, you have to plate and garnish your creations. From there, the food goes out into the restaurant to hungry patrons, just like in the movie.
For a DS game, the 3D graphics are certainly detailed. Puffs of white smoke pop out when you land on bags of flour, running through fire singes Remy's coat, and more. There are also a ton of different animations for the things Remy does, ranging from hilarious to adorable. The 2D items in the kitchen aren't always the most detailed, but the cooking tasks are so enjoyable you'll barely notice it. The scenes in between levels detail what's going on with still shots taken from the movie, and some text allows players to get a feel for where they're at in the story.
The biggest issue with the game itself is how short it is. The entire game can be beaten in an afternoon, since most of the adventure missions take about five minutes to gather all the ingredients, and then cooking them up usually takes between five and ten minutes per dish. It will only take you about three hours to kill off the whole story, although the external cooking mini-game lets you have a little more time on it.
When all the ingredients are put together properly, even a movie videogame can be tremendously tasty. Ratatouille is one of those games, and if you take the time to sample it, you'll thoroughly enjoy the flavor.