I really, really liked it. All I can say is stick to less variation--The drums (with the alien noises) kinda made it seem a bit out of hand. I do, however, very much love the opening.
Maybe, could you, try making a song that is like the first parts of this, just guitar and some drums to keep it up, but with lots of buildup and effects.
It's a very "psychadelic" song, if I do say myself :3