the functionality associated with the nintendo ds, namely the touch screen and the magic seal system, was subject to criticism from reviewers. gamespot noted that it was difficult to use the stylus immediately after the game prompted the player to draw the magic seal, thus forcing the player to use their fingernail on the touch screen. other functions using the touch screen, including clearing ice blocks, were viewed as trivial, with gamespy calling it a "gimmick". however, ign dismissed the lack of ds functionality as a major issue, claiming that it "doesn't hurt the product in the slightest".