Build a game - Experienced bid only........

Hello, I'm looking for a developer that has extensive knowledge in the game Roblox. My son and I want to create an army style game for the Roblox platform. We will need help in creating the maps, avatars, uniforms, weapons, hit points. We wanted to create a game where our visitors can buy special weapons and accessories. We need the ability for our game to be able to transfer roblox payments from them to us using the roblox allowable platform. Please, we would like to entertain all offers but please only apply if you have extensive knowledge in creating a roblox game and you must must have created a currently operating Roblox game that has to be shown to us prior to considering awarding this product. Thank you for applying