The shoes, distracted from his interpretation because people noticed and commented upon it frequently. Remember that the first goal in interpretation is education of the audience. We cannot educate if we present ourselves in incorrect attire. Then try explaining it in character. Children especially will notice such breaches and will comment.
Shoes are expensive, but very necessary.
Spend the money for an appropriate pair of shoes or other footwear for your character. The study of first person interpretation is closely linked with that of acting. For this reason, a section on acting and basic techniques of stagecraft becomes necessary. There are even those familiar with acting who probably find this technique daunting. However, for our purposes, it is one of the best available so that we might present a completely formed character to our audience.