Cool sounds
I'm really enjoying your selection of instruments, though the metallic percussion gives me more of a southeast asian feel. I'm not really feeling the solo marimba part though, and some of the transitions feel kind of rough. I liked the style change from the first section to the second, but the other ones felt too abrupt - it doesn't really loop all that well either. I think you should try to expand on the sections some more and just make it full-fledged song. Some real potential here.