Do you like Super Mario Bros? Yes you do. I'm not asking - you love it!
jespertheend - already well known for elaborate puzzle maps - has come up with a particularly ingenious game-within-a-game, using a staggering combination of command blocks and wiring that I can't even pretend to understand! Mario's enemies act much as they should, coin blocks dispense rewards when hit from below, and...well, jesper explains it fairly well!
Of course, you don't have to limit yourself to merely WATCHING Super Mario Bros in Minecraft, you can get the map, resource packs, and more, by ! Keep in mind, this map currently (as of this writing) requires Snapshot 14w18b or higher to run!
Be right back, I have goombas to stomp...