Personally I don't care about the quibbling over semantics as far as "problem" vs "exercise". Fine, call it a "math exercise generator". That's something I personally wanted and was very happy to find this, and I expect it's something a lot of other people (especially people doing self-study) will find useful.

I think it would also be fun to look at contributing to this, and see about maybe adding some generators for additional probl... er, exercises. In particular, adding more stuff in the Calculus section might be an interesting challenge, and could make this even more useful.