I like it. Seems to resonate with something in my subconscious so as simple as it is, I find it intriguing. It would be even trippier if the view moved slowly through the tunnel in either direction.

The only negative comment I have is that the lighting is such that the yellow and green sections bordering the upper right corner of the tunnel look very flat in comparison with the rest. Some other color variations would be nice too - as it is, one could view it as a subtle Windows advertisement...