Edit unity source code

I have source code and I want edit some things in code:

https://www.sellmyapp.com/downloads/raccoon-rescue-bubble-shooter-editor/

1-configure chartboost and unity ads and admob to be working together


2-connect facebook login-share to my account in Facebook Developer

3-add Facebook analytics achieved level event

4-connect leaderboard to my account in Google play game services

5-connect products in shop of game to my account in Google play in-app purchase

6- change app icon(I will send logo) in source code

7- replace powered by unity to splash I will send it later

8- build source code to Android iOS Facebook webgl platforms

9- help me to upload Facebook webgl to Facebook instant games