Update memory-manager-concurrent

games/retrosnake/README.md

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+# Retro Snaker
+
+<p align="center">pure navtive JavaScript combined with canvas，no dependence</p>
+
+<p align="center">
+<img src="https://img.shields.io/github/languages/top/badges/shields.svg?style=plastic">
+<img src="https://img.shields.io/gemnasium/mathiasbynens/he.svg?style=plastic">
+</p>
+
+The results are shown as follows：
+# Show
+<p align="center"><img src="images/RetroSnaker.gif" width="650" alt="RetroSnaker" /></p> 
+
+# How to use
+
+You can do an attempt in my blog laboratory ：[http://www.chenqaq.com/lab/RetroSnake](http://www.chenqaq.com/lab/RetroSnake)
+
+You can also clone this project and try it locally 
+
+```
+git clone https://github.com/okaychen/RetroSnake.git
+```
+
+or use the `.zip`
+
+And the structure about this project is very simple，you just need to open the `.html` to have a try
+
+```
+RetroSnaker
+│   README.md 
+│   index.html
+|
+└───images 
+└───css
+│   │   main.css
+|
+└───js
+    │   snake.js
+```
+
+I think the focus is on the idea of the program， I do not compress，you can see the original JS
+
+# About settings
+
+<p align="">
+  <img src="images/main.png" height="420px" width="300px">
+  <img src="images/settings.png" height="420px" width="300px">
+</p>
+
+Main Function：
+
+1. you can choose wall as an obstacle 「on」or「off」
+
+2. you can choose speed the moving speed of the snake 「slow」「normal」or「fast」
+
+And the other rules are the same as the snake rules played in childhood 
+
+Such as：
+
+- You can eat your body or hit the wall to kill yourself （under the wall model）
+
+- According to how much food you eat to increase the length of the snake