This sounds pretty cool, a little suspenseful and tense. I like the whole continuum with track 1.
Death by Glamour's notes seem to be accurate for the most part (albeit I find the bass to be a bit questionable, but that might be the instrument choice). The balancing is kind of off though. Those high notes are way too loud against the bass, and also the instruments don't exactly blend. I feel like track 1 at measure 32 needs an extra track to replicate the bit of "delay" in the original (from what I heard anyway).
Did you randomly decide to shove the second note of track 5 at bar 6 into the left panning? Because that was an...odd choice. It's too bad you didn't insert those higher echoey notes into bar 8 - that would've been cool.
At first I was like "oh yeah, I see this happening" but right when it hit bar 16, it started to sound really dissonant - starting from the fact that the notes just don't go together. You don't need to be extremely strict with mashups - tunes, when overlayed, don't always fit together perfectly. Try adjusting the chords in that measure to what Death by Glamour's chords actually are - their rhythms can still keep the "feel" of Meltdown while actually supporting Death by Glamour's lead. Or you could try the other way around, by adjusting Death by Glamour's melody to tune to Meltdown's chords in that bar (but I think the former is simpler/makes more sense).
The last section sort of works, but yeesh, track 2...
Stronger Monsters is okay - the first part sounds good, but anything measure 28 and onwards is sounding a little off to me - like the notes were transcribed a semitone off or something. I'm not super familiar with the original though, so I may have another listen later.
