Does the % annoy you, and did you upgrade all spheres?

[LunarWeaver]

I like the idea to a point, and it did give you some replay value, but the % was so strict it forced you to use a strategy guide to get 100%. I can't imagine anybody pulling it off without one, though I'm sure somebody somewhere probly has. I wouldn't mind seeing it again if it was handled in a more lenient way, namely where you can't miss something trivial and screw up your entire game just over one small mistake.