Information storage medium and a game system

PROBLEM TO BE SOLVED: To provide a program, an information storage medium, and a game system which enable a player to easily recognize the distinction of an indication mark to which special processing is applied and other indication marks when the special processing is applied to the display control of the indication mark in a game of reproducing musical piece data and evaluating the input of the player. SOLUTION: Under a prescribed condition, the indication mark set to a non-display state is switched from the non-display state to a display state, and the indication mark switched from the non-display state to the display state is distinguished from the indication mark preset to the display state. COPYRIGHT: (C)2010,JPO&INPIT