 The Thousand @-@ Year Door has a unique visual style . The graphics consist of a mixture of 3 @-@ Dimensional environments and 2 @-@ Dimensional characters who look as if they are made of paper . At different points in the game , Mario is " cursed " with abilities that enable special moves in the overworld , all of which are based on the paper theme . Mario can fold into a boat or a paper airplane by standing on a special activation panel , and roll up into a scroll of paper or become paper @-@ thin . The game 's environments also follow this theme ; for example , illusory objects that conceal secret items or switches can be blown away by a gust of wind due to the environment 's paper @-@ like qualities . In certain parts of the game , the player controls Bowser in multiple side @-@ scrolling levels based on the original Super Mario Bros .. Additionally , the player controls Peach in the X @-@ Naut Fortress at the completion of most game chapters . 
