It's pretty badass, that's for sure!
That guitar was an excellent choice. It was perfect for a song like Nuclear Fusion. My only gripe with the guitar is that during some sections (like around 1:15) it feels like it gets slightly cut off.
Drums were pretty powerful as well, and the bass complemented it nicely.
The piano was a nice touch; I think that without it, the song wouldn't of felt as Touhou(ish?).
Good work! I always want to listen to your stuff, SSJ.