Super Mario World is one of the best side-scrolling games of all time and if you have one game for the SNES this is it.  It is just a fun game that gamers of all ages can enjoy.  I should know, because Super Mario World was the first video game I ever played, and let me tell you it was some experience.  Looking back on the game all these years later and my stance still hasn't changed a single bit.  Super Mario World for the Super Nintendo is a keeper.