It's a nice chill atmosphere here.
I think I would try to not only have the same background sound. When I started making music, I definitely kind of fell into the trap of making ambient music that's a bit repetitive. One thing that pops out to me that I would want to add here is something like stop that part and then do something where you just have this very subtle soft drone, and continue the melody over that soft drone.
It's a way to add variety to ambient tracks that doesn't end up making it too thematic. I know when I was getting into composing for the first time, the Skyrim soundtrack I found to be just such an excellent example of fairly simple, but beautiful and varied ambient music. Listening to it helped me get a better grasp when people told me my stuff was too repetitive .
Anyways, well done, I'm looking forward to seeing more! :)