Firstly, right after a few minutes and got the first error: Error: Functions named Hello, World, or a combination of the above are not allowed. Found function helloWorld() at dontTryAndCheat

I want to point your attention that var a = function(){} isn't function a(){} !!! Assertion isn't a named function in JavaScript!
(Yes, i already know how to solve this step, but you should edit the Description)