Hm...
Unfortunately my speakers aren't working, so that drags your score down a little.
A nifty little game, that be true, but the concept got extremely repetative in a very short time. I think fast was definitely the best to play on for this reason: People like action packed games. They like to be fully engrossed in something that's speeding past. Most people are impatient when playing a mini-game to pass the time. However, I was inclined to try slow because you spoke so fondly of it, and I agree it's a lot of fun when you tone down the speed and just try and weave your way through.
Perhaps if you changed the asteroid colour from green to something else, it would be easier to pick up in peripheral (sp?) vision. Otherwise, not much of a storyline, but a definitely cool game. I liked it!
~VelvetDarkRocks~