Endless runner typer game in Unity

I have a template (asset) I want to change the character, environment, the collectible and add a few extra features I will provide you all assets. Features to be added 1- Reskin Game - Use the New UI 2- Change character 3- Add New Animation (Stone Throwing) 4- Add bicycle riding and animation 5- IAP - New Characters 6- New Set of Collectible 7- Destructible Collectible with stones 8- New Obstacles 9- Puzzle and Name 10- Intro Animation 11- Facebook Integration 12- Backend server integration 13- Facebook share and Points