I personally like that Spektor is trying a new approach to the art style. Even though I love the space theme as much as you do, I understand completely why Spektor is letting it leave. As he said before, it will help make the game more distinct by having it underwater rather than in space. And since this game is still early in development, it wouldn't hurt to change the direction of the game, as the community of this game is still rather small. I hope that the new artstyle doesn't drive away new players once its revealed, because I want the community to grow even more.