Wow that is really cool. It definalty looks like a vortex into another world, like deons or spirits are chasing you down a spiral tunnel into oblivion. I like how you have given asymmetry to the peice by one side being lighter than the other, otherwise this could have come out a little sterile and plain, with the object being centred. The progressively fading spirals which get more and more indistinguishable give the image a real feeling of depth. I also like how the spiral draw your eyes around the picture, adding to the overall feeling of spiralling motion into a vortex!! Very cool - high marks from me.
Really nice colour palette and clean lines. For me, at least, the colour is one of the stronger elements. Both background and fractal work very well together.
There is a hint of 3-D imaging , which I am wondering if at all, could be enhanced? As is, it adds some real 'depth' to the image. A little stronger and I believe this could be a standout.
I'm not in abstracts usually but I like the colors in this one. Nice detail and I like the depth of it. Reminds me of the eye of a hurricane. Maybe you should think about renaming it. Nothing about it reminds me of a nightmare. But then that's just my opinion.