It's not bad at all. I actually like ambient music, however I felt that this progression began to feel a little drab about a minute in and I'd have liked a new section to be thrown in to give me a little adventure to go on, you know? I felt like I was stuck in the same place here, which isn't a bad thing, but I like to go on journeys in music and I just felt that this journey wasn't too eventful. To give you some criticism that has actual application, I personally would've liked a "counter section", where it picks up in intensity and alters the chords you're using to give it more stress. I would suggest chords like dominant 7s, half-diminished 7s or fully diminished 7s. I mean, play around some and find what you like, as with all music, this is purely preference. I'm simply trying to provide you some decent feedback <3