A gaming device having a bonus scheme wherein the success or failure of a current selection directly affects the player’s chances for success in a later selection and the player’s chances for obtaining the highest bonus award possible. The backlight unit includes a surface light source, a diffuser sheet uniformly diffusing incident light from the surface light source, and a light collection sheet collecting light diffused by the diffuser sheet. A roller mount is disposed under the slide board panel and includes, at a minimum, opposing and parallel guide rails. The silicon oxide and silicon nitride layers may be subsequently thermally annealed. In general formula, R6 to R8 are an organic group having 1-12 carbon atoms and symbol A is a group constituted of H, C, N, O, F, S, Si, andor P.