very very good.
but there are still wrong notes left at
2:06/2:07
4:26-4:31
4:40-4:43
maybe it's intended, but for me it sounds wrong.
personal taste (that's just me!):
- i think i liked the higher tuned lead better (my ears are c64 proven and can't be hurt by squeaky sounds

). i felt it had more life to it and fitted better to the euphoric style.
- i'm not too keen on the vocals, imo they add nothing to the track, instead they overshadow it (esp. 2:10-2:40 and the piano part). they seem a bit uninspired and random.
- the transition at 4:15 could be better
- the "new" intro with the lead played in chords is correct but i'm not sure if it fits perfectly for that instrument. it sounds a bit "whiney" compared to the arpeggiated sound of the original.
but again, that's just nitpicking, personal taste and of course you can never satisfy everyone 100%...
nevertheless great work so far!