This is a great concept, I love the chill nature of flying through space in this, and all the art is beautiful. I will say that the combat feels a little unsatisfying in that I couldn't find a way to effectively attack enemies while also dodging their fire, even when using the boost. Maybe the enemies could turn slower, giving you a chance to get behind them. Aside from that, a great game. I'd love to see it expanded upon, maybe with a more in-depth trading system, or maybe some aliens that give you missions to complete to get rewards instead of trading.
Sorry, I'm designing my own game at this point. My point is, there's lot's of places you could take this, so I say stick with it.