As was the case with my fellow commenter I am just not quite sure what to make of this one.
Seemingly one has to time ones shot to destroy the moon without hitting the barrier (which worked for me and was easy enough to make first try) and then music starts playing as well as an animation saying 'moonshot'. Is the next level supposed to load eventually? From what I can tell, the graphics are nice, especially the barrier turned out really cool with this fancy 3d sinusoidal effect. Unfortunately this makes the space background look a little flat in comparison (and at least for me there are visible artifacts). If there are supposed to be more levels with more complexity, I'd be happy to come back to this and take another look.