Before the tech demo started, the player would see Yoshi's Island rotate, showing off the abilities of the GBA's.AMI FMV. It was reported that the game was just a tech demo though some speculated that Nintendo would create a full game as they did with the "tech demo" of Super Mario Bros. on the Game Boy Color. Despite not being released as a retail game, Yoshi's Story was important because of two reasons: Interestingly, in an early (and official),picture of the Game Boy Advance