Not too great

Well, first off, I rarely like ambient music. Most ambient songs have no, or extreme lack of, melody. This song is exactly that.

Not trying to sound pretentious, but this is more noise than music. The drum beat is kind of cool, but very busy and doesn't match the pads you've got going. The pads sound boring (referring to the notation, not the synth sound).

Basically, you've gotta work on melodies. Music is melody, harmony and rhythm. This piece is just rhythm (drum beat) and harmony (your pads). The most important part, the melody, is missing.

Work on melodies, then you'll notice improvement. I don't know if you play an instrument or not, but if you haven't, learning scales will help you write melodies. You can learn scales by googling. That's the first step for any musician.