Is it possible to take an already-fun classic like Super Mario Bros. and make it even more fun? Heck yea! Just add portal guns! Portal was a really fun game so let's take two fun games and mash em together. I say... That's GEEENNIOOUSS!

From stabyourself.net comes a game called Mari0 where Mario runs around with a portal gun. The game plays just like the classic side-scroller but you're free to create portals wherever you want to move monsters, create openings, and basically just make your life a whole lot easier. The game is free-to-play and also comes jam packed with a bunch of additional features like "create-a-level". So it's definitely worth a try.