I honestly am not very bothered by any prizes or such, I just felt like making this for you and try out the oekaki while at it. If you'd like to keep this one regardless if it's chosen for anything, I'd be happy enough :3 I hope it can at least be of some inspiration for you!
The green in the palette was used to make some aurora-like highlights on the empty blue parts. It just felt empty ^_^'
I honestly don't know what I'd do with it, so if you don't feel like keeping it, maybe sell it or some such? I don't think I would know how to do even that ^_^'