Most games in the series feature side-scrolling levels reminiscent of [[Super Mario Bros.]]. Throughout the game, the player is required to find and use special abilities in order to solve puzzles and finish the level. Occasionally the player must obtain secret items to achieve a 100% completion rating for the area. | Most games in the series feature side-scrolling levels reminiscent of [[Super Mario Bros.]]. Throughout the game, the player is required to find and use special abilities in order to solve puzzles and finish the level. Occasionally the player must obtain secret items to achieve a 100% completion rating for the area. |