Well
The percussion needs some work. It definitely sounds like you're just playing random sounds at the beginning, and throughout the rest of the song, it just sounds so basic. I'd advise losing the whistle, as it doesn't fit at all. And it should have more of it's own beat, instead of just following the rest of the other instruments.
As far as the rest goes, it's all way too repetitive. All I'm hearing is the same rhythm over and over and over, with the same chords. You need to add more of a melody, and not just add more instruments.
I wish you luck though, and I hope this review helps you out!