climbing to the moon

Somehow the first thing I thought was: "Uh, Rollercoaster Tycoon in space". Love the idea of the bottom part being sliced open and showing it's content like a mango, somehow it get's paperthin on the left part and the top part - that bugs me a bit - though it fit's your style.

Actually the only critic I have is that you didn't finish the upper right part, as it still show some white