Simplify the following text for a Grade 6 native English-speaking person.
Original: Pinball is a type of arcade game , usually coin-operated , where a player attempts to score points by manipulating one or more metal balls on a playfield inside a glass-covered case called a pinball machine .
Simplified: Pinball is a type of arcade game . In pinball , the player tries to score points by manipulating one or more metal balls on a playfield inside a glass-covered case called a pinball machine .