This is easily the most interesting version of 2048 I've seen so far. I really like that there are no numbers displayed on the tiles - after a couple minutes of playing, it becomes intuitive which tiles are at which height.
I got the idea for using colors only from http://prism.clay.io/. I agree -- the colors become intuitive after just a few minutes.
Not sure what it says about the colored version of 2048, but I found myself doing much better than the numbered version. My strategy didn't involve as much reading as it normally does. Maybe just one or two moves ahead each time.