JavaScript is a popular programming language that is widely used in web development, game development, and other fields. During the development of the Blackjack Coach game, I used the flexibility and power of JavaScript to successfully implement a series of features in the game. Here's what I have to say about my experience with JavaScript development for this game. First and foremost, it's crucial to understand the needs of the game. In the game of Coach Blackjack, players need to improve their skills through a series of trainings and challenge themselves to more difficult levels. Therefore, during the design and development process, I need to understand the rules and goals of the game in detail to ensure the viability and user experience of the game. Secondly, choosing the right game engine is also key. After careful research and comparison, I decided to use the Unity game engine for the development of the Blackjack Coach game. Unity provides a rich set of APIs and tools to make the development process more efficient and easy to use. By using Unity, I was able to quickly build the game's UI and effects, while also being able to flexibly handle the logic and interactions in the game. During the development process, I first wrote the basic logic and interactive functions of the game in JavaScript. This includes handling the player's input and output, as well as implementing the game's various state machines and animations. By properly dividing the functional modules and using the modular design, I can decompose the code more clearly, which is convenient for subsequent maintenance and optimization. In the design of the game interface, I made full use of the flexibility and expressiveness of JavaScript. By customizing events and DOM operations, I can achieve a variety of rich user interaction effects, such as button clicks, event triggers, etc. At the same time, I also used some CSS and HTML tricks to make the interface more beautiful and easy to read. In addition, in order to improve the performance and stability of the game, I also worked on performance optimizations and bug fixes. By optimizing the code structure, reducing unnecessary operations, and optimizing graphics rendering, I can improve the speed and user experience of the game. Overall, during the development of the Blackjack Coach game, I took full advantage of the flexibility and usefulness of JavaScript. By gaining an in-depth understanding of the game's needs and choosing the right tools, I was able to successfully implement various features and special effects in the game. This experience not only improved my technical skills, but also laid a solid foundation for future development work.