hmm I like the tone to start out... not sure I like the clashing at 0:11 and other parts like it. I like the atmosphere though the tune gives roughly 30 seconds in. I am going to assume that your notes are not harmonizing too well on purpose at 1:18, IMO though I am not sure I like that (especially since it gets dragged on further into the piece). I really like the way this feels at 2:20. Now things start to get a bit on the repetitive side 3 minutes in.
Anyways, overall this is a fairly good piece, granted there are some theory issues that I am unsure if they were intentional by you or not... IMO I didn't like their placements though. Overall I'd say this is about 4 stars out of 5. Keep up the good work Mock Up!