still, nxt man has a point. good use of samples, but i know u can do better with the musical typing.
Is it just me, or did you just slap a lot of premade loop into GarageBand, mess around a bit with the automation and then MAYBE add some of your own stuff? This sounds horribly sound-collage esque, and I notice so many overused loops being used in this very track. Sure looping around could be good practice or just fun, but if you want to go, like, a little further, I suggest you to stay away from the loops for a moment and take a bit of a deeper look into the instruments section of GarageBand. There's more potential to that program than loops.