Added details to readme

Author: siddhi-244

Simon_Game/README.md

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+### Simon Game
+A RGB color guessing game.It has 2 levels easy and hard. In easy level you have 3 boxes and you have to guess from those 3 boxes but in hard level you have 6 boxes.
+
+### Use of the Project:
+It is a great game to play. It is basically a memory game and will benefit your memory alot.
+
+### Tech Stack
+* HTML5
+* CSS3
+* JAVASCRIPT
+
+
+#### Steps to Use:
+
+---
+
+- Download or clone the repository
+
+```
+git clone https://github.com/Ayushparikh-code/Web-dev-mini-projects.git
+```
+
+- Go to the directory
+- Run the index.html file
+- Start playing!
+
+---
+
+## Screenshots 
+![Simon_game](https://user-images.githubusercontent.com/69195262/125393546-c5b57c80-e3c5-11eb-878f-7e57e9c8aa7d.png)