Pretty good but could be better
Let start off with what could be improved. The guitar work was too simple from about 1 minute on, you need to take more risks. I understand that this is supposed to ambient but you could of easily branched out from your strum pattern. For example you could have plucked or arpeggiated a little, strum differently, maybe snuck in a James Bond style riff, anything is possible. I liked your harmonies but there were times that you let the groove stagnate, where you stayed on the same chords with the same strum pattern for too long. The drums were okay, but they didn't add much.
Now, the good stuff about this song. Your harmonies and progressions were very good, not exactly noir sounding but still good. They show you have imagination. I especially liked the beginning. The song flows smoothly through each transition. It is a good song overall but if you took more risks or changed it up every once in a while it would be alot better.