perspective is available via Select button. Most of the gameplay occurs on interconnected field maps where battles take place. The game is driven by a linear progression from one story event to the next, usually told via cutscenes, though there are numerous side-quests available that provide bonuses to characters. Like many traditional role-playing video games, Kingdom Hearts II features an experience point system which determines character development. As enemies are defeated, the player and allies culminate experience to "level up", in which the playable characters grow stronger and gain access to new abilities. Combat in Kingdom Hearts II is in real-time and involves heavy hack and slash elements with button presses which initiate attacks by the on-screen character. A role-playing game menu on the screen's bottom left, similar to those found in Final Fantasy games, provides other combat options such as using magic or items, summoning beings to assist in battle, or executing combination attacks with other party members. A new feature is the "Reaction Command", special enemy-specific attacks that are triggered when the player presses the triangle button at the correct time during battle. Reaction Commands can be used to defeat regular enemies or avoid damage, and are sometimes necessary to complete a boss battle. In addition to the main character, two party members are usually present who also participate in combat. Although these characters are computer-controlled, the player is allowed to customize their behavior to a certain extent through the menu screen, such as attacking the same enemy Sora targets. In response to criticism, the "Gummi Ship" feature of the first game was re-imagined to be "more enjoyable". Although retaining its basic purpose of travel, the system was completely redone to resemble a combination of rail shooter and "Disney theme park ride". In the world map, the player must now control the Gummi Ship from a top-down view and fly to the world the player wishes to enter. Worlds are no longer open from the beginning—the player must unlock the routes to them by entering a new level, controlling the ship from a third-person point of view, and battling enemy ships. After the route is opened, travel to the world is unimpeded, unless it is blocked again due to a plot-related event. The player may also gain new Gummi Ships from completing routes, which is also a new feature from the first game. Drive Gauge One of the