It's a fun concept, and it works fairly well. It's a bit unforgiving though that as soon as get one karma you'd better restart the game instead of going all the way to the end of the meditation level :)
I did manage to pass the first level with 0 karma, but always got hit by either the first row of speedy burgers or the next row of speedy beers in the meditation part... so no enlightenment for me!