Super Mario Flash
Super Mario Flash is one of the best Mario Games around. This flash game plays very much like Super Mario Bros. 3 with the cool overworld maps that require you to move around and select a level. Of course there are the usually warps and shortcuts as well that you can take advantage of and the music is spot on. This flash game also comes with a sweet map editor that lets you create your own levels! It's time consuming but I've never seen anything like it before.