Super Mario 64 Chaos Edition is pure enjoyment if you are just looking to kill some time and goof around.
After suffering through a couple of lives and random instances of the level restarting itself, I managed to collect my first start due to all the items in the level gravitating toward me. One life down the drain less than a minute into the game. My first launch of this hellish incarnation not only made Mario entirely invisible but made it so that he could not open doors coupled with continuous health lose.
The sheer number of random effects that can occur during gameplay ensures that the player will be exposed to bouts of laughter and frustration as at times the hack feels like it is plotting against you. Alternate costume for Mario: Shadow Mario, along with some neat texture swaps.