One thing that is bugging me is the 1 pixel overlap from one letter to the next. It has more contrast than the diagonal to the background, so at first glance it looks like it is extruding out of the edge extra distance. I agree with Dr D, I think the black background is much nicer. One thing, from a graphic design standpoint, I was surprised when you said it was for kids and teenagers. The logotype is very modern and I think sophisticated, and I didn't associate it with that demographic on sight.