This has great possibilities (REMIX TIME BABYYYYYY) but my guy if you’re trying to go for an ‘Alan Walker’ vibe as you said in your tags you’re just going to need more devices. Whether to mix or fill-up the empty spaces. The melody is also a bit repetitive and more like a scale so it lacks some colour. But since you’re new to the site, I suggest hitting remix on other peoples’ tracks just to look inside and see what they did. That’s what worked for me and I still do it. Good luck! :D