This game had a new type of intense. I wasn't very good, so never did any Babel levels, but even the levels I did, a combination of love, frustration, adrenalin and the just one more go running through.
And the sleep at night. Took ages to unwind to get to sleep, and was rubbish sleep with this going through the brain.
Yet to pick it up the 360 version, might do it in a year or two, which will have given me some time since the last play.