This certainly belongs in Career & Education, not Technical Talk, moving. Good luck OP. Moral of the story, don't lie in your resume or your interview. Best recourse is to confess. You could try to salvage by letting them know you can't do it, but would like to learn. Then it's up to them to take the chance, if they liked…
Well lying is never a good way to get into a position but we can not judge anything without knowing about your skills and what you have said. But hiring an artist based on his word only and not on his portfolio is also something that nobody should do so I believe that you at least showed some of your skills. "I will not…