A game apparatus executes a game in which a player character is moved between different fields through a given traveling route according to an instruction input from a player. When the player character moves to a first area close to a door, a symbol "!" is displayed. When the character moves to a second area, a symbol set "!!" is displayed. In the second area, if unlocking conditions for the door are satisfied, a method of manipulation for opening the door is displayed. If the conditions are not satisfied, a method of manipulation for displaying a hint for opening the door is displayed. If the conditions for unlocking the door are satisfied, when the player performs the manipulation for opening the door, an action of the player character to open the door is displayed. Map data of the destination room is loaded into a temporary storage from a recording medium and then the player character moves to the opposite room through the door.