Full Screen Mario allows you to play Super Mario Bros. on your computer, create new levels!

For those too young to have owned an NES or too old and lazy to dust yours off, Super Mario Bros. is now playable in your web browser thanks to Full Screen Mario, an open source (and completely free!) browser game created by Josh Goldberg. And not only can you squish Goombas and revisit your favorite place to get infinite 1-UPs, but you can even create your own custom levels.

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