Well, I have news for you, Shnabubula. I played the game long before ever coming on OCR, and I did like the original soundtrack. Your remix captures the essence of the original perfectly, and (of course) makes it even better.
So, the review.
I really like the synth at the very start, but I'm glad you have some piano start at 0:08, otherwise it might sound bare.
The original soundtrack has quite a unique sound that really lives up to the game's title, Harmony of Dissonance. At 0:17, when the running piano part comes in (and who knows what else), it almost starts to sound dissonant, but for some reason, it doesn't. I still don't know why.
Are those... coughing sound effects at 0:17 and 0:22?
At 0:25, when that... thing... comes in. What IS it? It sounds like a cross between a synth with a cold, a chipmunk, and a whale. I swear, I have no idea what it is. Sounds good, though. =p
And then we finally get melody at 0:34. Yay! The highly odd-sounding voice (?) that accompanies it could've been left out without damaging the mix (maybe even improving it, imo), but it works. I must say that whenever I play it out loud I get some strange looks from my family.
I like how at 1:08 the other instrument takes over the melody. I like it better.
At 1:25, the mix gains a bit more depth. I've listened to it a bunch of times, but I still can't pick out WHY it does. Good work, anyhow.
The section from 2:15 to 3:25 is my personal favorite, and contains some of your best work yet, Shnaby. I especially love how at 2:22 the *searches for description, fails* thingy comes in with the high note running pattern just like in the original, and it sounds awesome and makes the entire mix worth listening to. At 2:30, that same instrument really goes wild and picks up some serious speed. Awesome.
At 2:49, everything comes together in a glorious display of dissonance that somehow works and is pleasing to listen to.
The drum bridge at 3:26 is great, and I like how the synth comes back in at 3:29 and repeats over and over the first phrase of the melody.
Everything starts winding down at 3:42, and the high note at 4:15 with the other synth coming in below it on melody works perfectly.
4:58 is another section reminescent of 2:15, and then promptly goes into the ending. The isolated voice at 5:17 (if only I could understand what it's trying to say!) and last note remind me of a technique used in classical music, when the entire band will pause (or just fade or hold a single note) and have a single instrument play a note or two, then all come back for the ending. Leroy Anderson's Christmas Sleigh Ride is a perfect example of this.
'Nuff said. I like this mix, despite all the quirkiness and lack of organization in some places. 4.25 out of 5.