Okay, this is just insane. Maze Frenzy.
This is just crazy Normally I hate flash games ... can't stand them. But then you come across something like this that is just fucking unreal. What you're not seeing in my screenshot here is that most of the stuff in the maze MOVES. And naturally, if you hit anything, it's game over and you have to start all over again. Hit up the Maze Frenzy site to give it a try. And check out the bottom of the page, because there's a link to an even HARDER maze. Due to my crappy wireless mouse and extremely shaky hands, I can't play it. But I'm sure there are lots of people out there that can just destroy this game. :) Just turn your volume down or the stupid music will drill itself into your brain.
Super Mario Bros - Koopas Gone Wild
Okay, I would NEVER play this because I barely have the patience to play through the normal game let alone something like this. :)
via @MasterOfHyrule