Yes jabor whem you do a game you arrange a deal in first place about many stuffs like if you get sponsored how much will be the % share and stuffs like that. Also i think the coder and the artist has the same right under a game. (unless the game is like a point and click where theres more art than progranming or something backward)
That really depends on what you deal before starting a game.
so we decide in wich sites each one will put the game, etc