Interesting, I like the unique vibes it gives off. Maybe try experimenting with the pitch? (High and low notes at the same time create a dramatic note if done in the right spots, just a tip) See how a larger variety of note pitches work to make a pattern that "speaks more," as for the percussion, try something that echoes? But this just what I think, nothing big!
Overall, good start! If you're already fully satisfied with this, good! I'm happy for you 🙂