Thank you so much for letting me know! It was a pretty obscure bug, it actually only crashed if you did that on a level with a shark on it and honestly I'm not sure why but I did manage to fix it.
I have adjusted the crank speed, it is now three times less sensitive, so please let me know if it is still too fast.
Version 1.2 is now available for download and has both these fixed and the level save bug fixed too.
Also congratulations on making it to world 4! Great work!