I have a concept for a multiplayer arcade game. It will be based on rounds where players pay to join. Players challenge one another and the winner keeps the pot (minue a percentage of the winning to go to the website)

I cannot reveal any more at this stage except to say that I am looking for a professional clean design and I will pick a provider based on examples of previous work, SPECIFICALLY games. Please make sure you show me samples of your previous work. Replies without samples or portfolio will be ignored.