Ho dang! this is amazing.
For that first arp in the beginning I would suggest adding a little bit of reverb to make it sound a little more full (And blend in with the other sounds a little more)
LOVE THE MARIO ;)
Man your skills are improving drastically, great work :)
Just be careful of that saw bass, it's a little overpowering and makes some points in the song kind of muffled (1:20 is where I caught it most, and earlier in the song it did it too) So make sure that sounds don't control each other and drown out the goodies.
otherwise this is great :)
Epic ending too ;)