It's a sweet little melody! There is one exotic thing though that kind of surprised me, and maybe that was your intention, but : You seemed to start in the key of G-major, with a little melody with a good bass, that's alright. But then from the 9th second, when you do the rundown from A to A an octave down, you're playing an F and not a F#, which would make it G mixolydian. Nothing wrong with that, but when you have the expectation of G major, that F (third note in the rundown from 00:09, as well as 00:45 ) sounds really dissonant to me.
So if you'd like to do an experiment you could switch out that F for an F# and see how that sounds. Nice work !