I need some feedback for my newest song.

[Qwertygiy]

I started making another song using some melodies I've had sort of floating around for a while, and I like the beginning, but I can't seem to get a good middle and don't really have an ending yet. Should I add more basslines and submelodies? Should I add an alternate melody or two? Should I have more "instruments" or effects? I want to be able to finish it, but I'm a bit stumped on how to best do that.

Here's the song, "Dandelion Summer". Like I said, the middle's a bit muddled and there's no ending. http://keybored.x10.mx/musicdata/Dandelion%20Summer.mp3