This seems to be a pretty accurate rendition, as far as actual notes go. I do hear a couple of wrong notes on channel B, frame 10, halfway through. The melody should go
D D# F G(use instrument 2 to hold this note).
But, the volume envelopes aren't as accurate or detailed as in the original.
Also, shouldn't there be detune on the octave parts on frames 2,3, 5 and 6?