1. Bill's lack of confidence. Bill often feels like he isn't good enough and that he doesn't belong. This insecurity makes it difficult for him to trust others and to believe in himself.
2. Greg's bullying. Greg is a mean and spiteful boy who loves to pick on Bill. He makes fun of Bill's appearance, his intelligence, and his family. Greg's bullying makes Bill feel even worse about himself and it makes it difficult for him to stand up for himself.
3. Mr. and Mrs. Peters's neglect. Bill's parents are so focused on their own problems that they don't have time for him. They don't listen to him, they don't support him, and they don't seem to care about him at all. Bill's parents' neglect makes him feel lonely and isolated.
4. The search for the treasure. The search for the treasure is a physical and emotional journey that is filled with danger and uncertainty. Bill and Lemon Brown have to overcome many obstacles, both natural and man-made, in order to find the treasure. The search for the treasure also tests their friendship and their trust in each other.
5. The conflict between good and evil. The Treasure of Lemon Brown is a story about the conflict between good and evil. Bill and Lemon Brown represent good, while Greg and the other bullies represent evil. The conflict between good and evil plays out in both physical and emotional ways throughout the story.
6. The conflict between greed and generosity. The treasure is a powerful symbol of greed and generosity. Some characters, like Greg, are willing to do anything to get the treasure, even if it means hurting others. Other characters, like Bill and Lemon Brown, are willing to share the treasure, even if it means sacrificing their own interests. The conflict between greed and generosity is a major theme of the story.
7. The conflict between reality and illusion. The Treasure of Lemon Brown blurs the line between reality and illusion. Some characters, like Bill, have difficulty distinguishing between what is real and what is imagined. Other characters, like Lemon Brown, seem to live in a world of their own imagination. The conflict between reality and illusion is a major source of tension and suspense in the story.
8. The conflict between hope and despair. Bill and Lemon Brown are both fighting against despair. They have both experienced loss and hardship in their lives, and they both have reasons to give up hope. However, they both choose to keep fighting, and they both find hope in each other. The conflict between hope and despair is a major theme of the story.