The cubes stabilize you. When you collect them, they reset your balance meter to the center. (Except that two cubes that give or remove the dog snout)
ohhh, interesting very nice to know. Hey canonically is the MC human or animallian? or is it meant to be ambiguous so you can envision yourself as the MC?
Pretty sure they're human and supposed to be the player, since Mike just says "you" and we don't get any info on them.
The MC is you ;]