You have copyright completely wrong and you have no legal grounds to demand a takedown just to be absolutely clear.
Copyright strictly means everything is made by the team working on it. NOT mechanics or features. Those would fall under trademarks which must be applied for and shown to be unique and vital to your project. If he stole your code directly, any images, uses your name (Fifth Family), and similar DIRECT use of your work then that's copyright. Copying features is not.
Similarly colors (with few exceptions such as Reese's and their orange), layouts, and words can not be trademarked or copywritten without a multi million dollar lawyer and even then it's damn near impossible to defend