So, I've gone through your 3rd WIP now (finally!).
Fire 1: Why did you rotate the game world a 2nd time? I cannot see a direct reason to why it was done.
Fire 7: If you collect all the CCW rotates, instead of 2 CCW and 1 CW rotate, and begin with the right side you should be able to speed up the gem collecting a bit by making the 2nd rotation of the game world earlier as the gems will fall into you.
Water 1: I guess you don't have enough health to take a hit from both a squid and the shark?
Water 3: Will this save additional frames over your improvement, this is the shortest path that I can find (with reservation for some falling behavior being misunderstood):
(Sorry for the mess, if you zoom in it will be easier to understand it I think...)
Water 14: Consider the gems from left to right numbered 1-7, wouldn't it be faster to collect gems 1-6 instead of 2-7? Overall you should save a few squares of walking.