It's a really nice and chill song. The melodies and chords are pretty good. I feel like you have some very good foundations for the piece here, but it's laking a bit of mastering that would make this stand out in a big way.
One thing you could do to improve is to allow each of your samples to swell in an out of each note if they're parts of the background bits. This would help make it sound a little less like you just plopped notes into a DAW at random and more like your musical intent behind each note in the song.
I know that you're going for some orchestral and cinematic stuff here, but I feel like some soft pads sitting on a drone in the background would be good for this. They shouldn't be too loud, as that might take away from the current vibe of the piece, but just a little to spice it up and give it some character.
Overall, this is a good piece that if just a couple things were added could become great!
P.S. If you're wondering how to get your music to be louder, you can but compressors/limiters on everything to get it to be the same general volume as other people's music.