I always try to save 100% where possible, except in 'Cascade', which is such a pain! I think I've saved about 90% before in that level.
Conway, I can only manage to save 10%. If I remember rightly, you have no blockers, which would mean a 90% target would make the level impossible.
Unless there's another method I don't know about?!?
I don't know, your better than me anyway; i still can't do half of your levels... :mikesad: