Sorry if i'm being a bit too harsh here, but i'm going to address a couple things;

While you may think a track can work as a long, chill piece, your music won't be the only thing on someone's iDevice, nor will you be the only artist they listen to. either add more content in your song(in the form of different chords, key changes, different sections, what have you) or cut down the length. simple enough.

Change is a good thing, even in music. I heard a couple small changes in chords, but that's about it. the same glitchy pattern, the same rhythm throughout. add some variation, go full glitch and mess stuff up in the process, at least in doing so you would've taken a couple steps outside your comfort zone.

since this is a battle theme, it'd be characteristically correct to have the drums at the beginning, and to have some high-level action-y stuff going on. now, the definition of style and being in style changes from person to person, but battles themes are typically HYPE HYPE HYPE SO MUCH HYPE- didn't really feel it the HYPE from this track. maybe make it a little faster.

The drums are WAY TOO COMPRESSED. at the very least lower their level in the mix.

Use more than one instrument, or at least change the main synth. instrument variation is change, and like I said earlier, change is a really good thing. if you don't have much to begin with- look all over the internet, there is plenty of good, free stuff to use.

I hope this helps. :)