Create rewards points website

I want a website that will offer prizes for points and offer contests to be entered using points. The website will have to generate tickets and keep track of the points each user has and when the points value is reached then the prize is released. And for the contest the end user will use points used to enter contest and when the total points are reach by a limit I set and it will be a total from all users so it is possible that anyone can will if the point value is reached. and the user will get referral points after they get there own points. The admin section will consist of being able to config the points and prize section , Also i want to be able to issue prizes manually.