Good beat, great melody, simple mixing and a nicely rounded product at the far end of the piece.
I like the way that you've added a counter melody to compliment the main melody, without complicating the piece, which I think would damage it, rather than helping it.
This has quite a large scope for being used both as ambient sounds and menu tunes easily. Plus there are always scenes in movies that look for this sort of sound, so give it a little while and you could be making something big out of all of this :)
[Review Request Club]