The arrangement itself is good, but the piano just sounds a bit dull, or like the dynamics were flattened in some way. Maybe an e/q issue?
Anyways, the part when the drums pick up was unexpected but nice.
No big complaints the whole way through, other than the issue with the piano's dynamics.
I really do like the arrangement you have at the beginning of the piece. In fact I could have listened to an entire piece based off of just that (without drums or bass coming in). But again, what you've got is enjoyable, so good work.