structural:expansion, structural:summarization
Playfield

The playfield is a planar surface inclined upward, usually at six and a half degrees, away from the player, and includes multiple targets and scoring objectives. Some operators intentionally extend threaded levelers on the rear legs and/or shorten or remove the levelers on the front legs to create additional incline in the playfield, making the ball move faster and harder to play.

The ball is put into play by use of the plunger, a spring -loaded rod that strikes the ball as it rests in an entry lane, or as in some newer games, by a button that signals the game logic to fire a solenoid that strikes the ball. With both devices the result is the same: The ball is propelled upwards onto the playfield. Once a ball is in play, it tends to move downward towards the player, although the ball can move in any direction, sometimes unpredictably, due to contact with objects on the playfield or by the player's actions. To return the ball to the upper part of the playfield, the player uses one or more flippers.

Manipulation of the ball may also be accomplished by various tricks, such as " nudging ". However, excessive nudging is generally penalized by losing the current player's turn (known as tilting) or ending of the entire game when the nudging is particularly violent (known as slam tilting). This penalty was instituted because nudging the machine too much may damage it or result in unearned play and scoring that wears game parts. Many games also have a slam tilt in the bottom of the cabinet to end the game if the cabinet is raised and dropped to the floor in an attempt to trigger the coin counting switch falsely.