Casual games are a sub-genre, they can exhibit any gameplay. They are typically identified by simple rules and low requirements for timing and skills. Usually, casual games impose low production and distribution costs, which is why developers widely produce them. Casual games can perform at any platform; they do not require any individual peripherals. Usually, there's no need to save to continue later, mechanics include a one-button mouse or cellphone keypad, but the gameplay is still puz