Nice
Haha, the ending doesn't really fit, it's definitely interesting tho. This sounds like it could be a sick intro to a song and I think you should try and expand it in that sense. When it built up I was expecting some ridiculous drums and a sweet theme and I think you could go for that. Nice work with the ambient sounds there. All in all, it's short and sweet, but I think expanding would do it justice.
~SinJim