Providing on-line non-downloadable computer games; providing on-line non-downloadable electronic games; providing on-line non-downloadable computer games that enable a graphical visualisation that responds to movement of a user; providing on-line non-downloadable electronic games that enable a graphical visualisation that responds to movement of a user; providing on-line non-downloadable computer games that enable a graphical visualisation that responds to the movement of a user using sound-b...