Thanks for answering!
I thought about birds and clouds, and maybe a little rustling of trees /grass to add motion to the background (but not too much, so it becomes distracting), but don't know how hard it would be.
The style or genre of the music isn't the problem, i actually think the song is quite fitting. My problem comes down to the instrumentation/effects: The Piano (?) sounds too mufffled/damped and notes, due to the strong reverb, stay around ringing too long, so every note is pretty undefined. This causes everything to blend together and ends in a sadly unfocused sounding track.
I hope i explained it good enough and is helpful!