A recruiter on call, going through my GitHub project with MIT License: "but it is taken from MIT, is it?"

Yesterday I was invited to Google's Foobar Challenge. I just solved the level 1 problem which was simple. I don't have a CS degree nor am I studying for one. A lot of posts on Reddit and Medium suggest that you won't be able to get through the latter challenges if you don't have extensive knowledge about CS concepts. May someone guide me in the right direction?