Alright, I like what you did here. Not my taste, but it's good music. The only thing about it is that it sounds so hollow. I'm thinking you should boost the bass of the hums a little bit. This would go great with some actual singing vocals, and then perhaps you'd have some light drums kick in around the 2:25 mark with a giant chorus that lasts for a long time. Leave that ending effect for after that chorus, and you have yourself a more complete song. Just thoughts. I like it, keep it up.
Kaeo