Jurassic Park: The Game is best classified as an interactive movie with extremely light adventure elements. It consists mostly of quick time events, a term that originated in Shenmue that basically means timed button presses. It's like an evolved form of gameplay from the Dragon's Lair arcade games. Unlike the old arcade games, the controls for button presses are presented on screen. The adventure element in Jurassic Park consists of scenes interspersed between the QTEs where you search a scene for clues on how to progress. You interact with characters by speaking to them, manipulate objects, and interact with the environment. There is no inventory. These adventure-lite scenes are similar to the crime scene portions of Telltale's CSI games.
If you take into consideration that the game is not a traditional adventure and are not adverse to the fact that many scenes that consist solely of timed button presses, then the game is worth buying.
You can buy episode 2 for iPad 2 from the app store here.