Well written tune, lyrics flow well, easy to remember hook " love letter on a paper airplane " . Hard to say specifically who it reminds me of but it's got a cool 1960's /70's singer songwriter folk vibe about it.
I really like the idea. The concept of the song is very original. I don't think I've ever heard it before.
It takes the airplane imagery often associated with distance in romantic relationships, and adds the deeper dimension of using it as the love letter itself. Brilliant.
One of those ideas I really wish I'd thought of myself.