The intro beat gives a slight tropical feel, and though it's a little repetitive, it progresses quite nicely. The transition at 0:55 has an echoing blast noise that sounds strangely out of place. The whistling is great - well timed and fits the beat very well. After that the song seems to slow down with looping synths. It's pretty dry after that, repeating the same synths over again, but the ending is pretty nice.
All in all, it's a nice song. It's a little repetitive, but there is some variety, and the whistles are very well done. Good work.