1. 介绍和项目概述(1. Introduction and project overview)
2. 硬币游戏对象的设置(2. Setting up the coin game object)
3. 硬币行为的脚本化(3. Scripting the coin behavior)
4. 设置硬币UI(4. Setting up the coin UI)
5. 修改投币脚本更新用户界面(5. Modifying the coin script to update the UI)
6. 创建游戏状态(6. Creating the game state)
7. 为生活设置UI(7. Setting up the UI for lives)
8. 用额外的生命奖励玩家(8. Rewarding the player with an extra life)