Distant Horizon - Mock-up Cover 3

This is another mock-up book cover illustration I did for the novel I'm writing, Distant Horizon. While I know that if it gets published, they'll likely assign their own cover, I'm enjoying seeing how different covers affect the sense of what the book is.

Seeing how I recently learned how to work the vector tools in photoshop CS5, I used photographs I've taken for reference and my imagination to put this together.

Maybe not my best work, but my favorite part is the limited color scheme and the bubbles.