There's much I like about the song.
The idea behind the song and what you were going for is awesome, and I liked it's structure a lot.
Mattresses or closets work significantly better for soundproofing on a budget, though I only noticed background noises right after the solo...of which, could use some tightening up, and the solo itself ended with, err, little finesse.
There also must've been something slightly off with the timing as you layered the different takes, because there's this weird staggard effect going on through MOST of the song. Where a split second after one strum, there's instantly another, so there's this weird copy-cat echo effect going on...it would overall SEEM much stronger if it was one punchy note...though I can empathize that would be difficult to do because of the song's tempo, it's what NEEDS to be done for the song to be better.
It needs bass. TASTEFUL bass, that's supporting the guitars, not mimicking them.
It needs drums. GREAT drums. None of that auto-tempo, machine drum crap either...somebody who knows what they're doing, or at least faking it enough to sound great...like In Flame's drummer, just doing the bare minimum of heavy (lol)
I guess it would need vocals, but not death metal growling/pig-squeeling/incoherent bullshit...it needs something powerful, with lyrics that tell the story of the fearless, dedicated pilot, honor bound to guide his machine to victory beyond death, devoted to his leader. If I were more confident in my singing ability, I would totally audition.
It's also in my firm opinion that the song needs to start off smoother...with class...KEEP the segment in the beginning as it's building, but start it off slower, with class...your music is telling a story. He's not launching in any particular hurry off of those wood-decked aircraft carriers...he has thoughts of his family back home...the serene beauty of Japan...the looming threat of American invasion onto that beauty...and DESPITE the fear, DESPITE the possibility of a fiery death, screaming through the skies in air overwhelmed with flak and bullets, he'll do what he needs to do...maybe, this one last time. Starting it off with beauty and grace would make this segment you have here MUCH, much more powerful.
Lastly, as I listen to this again, clean up and work on that solo. Make sure you don't have too much going on, and don't be afraid to sloooowww dowwwwnn the supportive riffs behind the solo, so it's not "JUNJUNNAJUNJUNNAJUNJUNJ-J-JUN" CONSTANTLY in the background. Break it up! Think of the emotions behind it. :D
Visually, we got nothing, and that admittedly hurt it's score. What saved it, actually, is moreso the song's potential. I think you're onto something here...it's just an early draft of something greater to come.
Fived to Save, you must perfect this!