Originally I was going to rate this a 4, but I wanted to give you a 5 so hopefully you'll get more reviews.
I really like this, its a simple but effective ambient song. There's nothing that just doesn't work at all, in fact it has a nice atmosphere to it. It is very dream like lol.
I will say, even in ambient songs its okay to build to something. Like there could've been one more instrument added around 2:45, like a violin or something. That would've been a nice counter to the guitar, and then you could do something different before ending the song.
That would've probably been what would make me give it a 5 instead of 4.5 lol.
Keep making music dude!