This is a challenging first arrangement! Kudos!
This piece may be a bit hard to duplicate on piano just because of the percussion. JSYK.
First off, if you want your sheets to make it onto the site, you'll need to follow these
As far as the actual piece goes, it's sorta hard to say for reasons stated above. I think the entire bass clef could stand to be bumped down an octave. Good job on the treble clef chords; you have a good ear. You could add a note on the bottom so they retain their identity and yet sound fuller: i.e. on the first measure, instead of Bflat - D you could put F - Bflat -D. Sorry if that's confusing.
Also, at about 14 seconds into the song, there's a synthesizer playing some high notes very similar to those in the bass clef. Could you possibly incorporate those?
Good first piece, and welcome to the arranging league.