So this sounds really clean to me. Overall I would say you did a good job technique wise. The piano definitely has that Dre feel, as do the drums.
My only complaint is that it just sounds kind of boring to me. Don't take this as me taking a shot you though. Sometimes just being able to get the technique down is a huge stride. At that point you just gotta throw your own flavor into it.
With that being said, keep up the good work fam.