I feel like the level of detail of the earth compared to the meteor is a bit off - the earth is just flat colors, but all the little dots and outlined craters on the meteor make it not quite jive. I'd get rid of the little dots, and choose a solid, darker color for the craters. Love the composition!
i'm not usually a 'go minimalist!' sorta guy, but I think in this case it works better for what you've got going on here. Excited to see the final version!
