With your explanation, I could see it working as a kind of intro / pre battle theme in a game. I didn't really take the time to see it's use case as is and kind of judged most of the submissions on the idea of a "complete". Now, I'm also thinking something like Approaching Champion Cynthia's pre battle theme in Pokemon where the whole point is just build up and create tension before the looping battle theme. So either option is pretty valid: either this acts as a standalone build up theme to be paired with another piece with the resolution to the build or to expand on it as a singular piece.
I'm glad my feel based opinion is helpful in some way!