Yes, there are some differences that I genuinely think are too tough.
And about the clown, yes, sometimes it is just about luck, but that's the main purpose of the clown, he is just a really nasty cheater.
I agree, it is not fair, but I designed with that intention, because I knew that in the end people will figure it out how to spot the new differences, it is just try and failure, and when you finally beat the nigthmare it really feels like a great achievement, and I wanted that.
I believe on you guys, I know you can beat it :)