Just Plain Rockin'!
Aside from being one of the best frame-by-frame animators on the site, you are also great musician to boot. I can see this being used in a credits sequence of some sort. Ok, let's get started...
In terms of instrumentation, you sure did a great job selecting which instrument would be fitting. Plus, I like that guitar solo that you did for this. For something that's improvised, it's a lot better than a lot of the musicians on here. I can't believe that you and Nanashi aren't in more musician favorites, but the sparse am-mount of songs are the reason why. Here's a hint, I think it's time that you started submitting again.
What I approve of:
-Excellent guitar solo
-Clever synth selection
-Great composition for something that was improvised.
-Seems that it would be used in a opening/closing sequence.
What I disapprove of:
-Nothing at the moment
Overall: Here's a ten for you Keicho, and I would like for you to submit more of your stuff here.