There were only about three levels in the demo and each of them could be completed in under 30 seconds. I didnt think the 3D effect was super pronounced, but it did help a lot with judging the jumps from platform to platform when compared with the 2D version.
The graphics were far from anything special. It was basically a set of about ten semi-transparent platforms that were a few different colors. Some platforms hung in the air above others so the cat could hit his head.