I really like this! If you don't mind me asking, what is your DAW? inb4 "FL Studio"
Yeah, there could be a little more humanization on the percussion (coming from a percussionist ). Like many things, trying to humanize percussion parts can be a pain in the ass, especially rolls because often, rolls aren't exactly in time (a roll lasting two beats might consist of twelve individual strikes of a marimba bar, or maybe only ten. Maybe a roll will speed up at the end, or slow down in the middle. Yay, expression!). However, this is a very, very good start. Keep this up!