I'm on the asteroid levels now, pretty certain that all of the earlier levels are now working properly, I have found some bugs and design issues but they've all just about gotten fixed and I can progress through everything smoothly. The moon animations now seem to be working great, I removed one of them though because I simply hadn't gotten the frames right and it was looking awkward but at least now it's all looking fairly professional.
Another 10 levels to go and then I'll be just making sure the ending is setup correctly, one of the reasons it's taking awhile is because I'm making sure to grab every collectible there on each level. That way I know I haven't made any bits of the game completely impossible to finish.