Visualizers are a lost art. If you're like me and you never quite gave up Winamp and the various presets and visualizer options, seeing new ones is always a treat for the eyes. Not to mention, what a wonderful way to showcase your work!
I heavily recommend turning on Fullscreen in the options, and playing with the options for fine-tuning the visuals. My favorite presets are Connect the Dots and Black Hole, though even the default preset is really pleasing to look at.
I won't spend too much time reviewing the music since it should be about the visualizer, but I'll say this: you are one talented artist and I will definitely be checking your Audio Portal posts.
Only have a tiny nitpick: No pause button! I would have liked at least that, but I don't think that nitpick is worth reducing the score. Well-deserved five stars.