（だいぶ前に作ったのだけど）

##HTML

<div class="wrapper">
    <div class="controller">
        <div class="ci"><div class="logomark"><span class="part1"></span><span class="part2"></span><span class="part3"></span><span class="part4"></span></div>Nintendo<br>SUPER FAMICOM</div>
        <div class="subBtn selectBtn"></div>
        <div class="subBtn startBtn"></div>
        <div class="leftArea">
        <div class="clossKey">
        <div class="btn top"></div>
        <div class="btn top_right"></div>
        <div class="btn right"></div>
        <div class="btn right_bottom"></div>
        <div class="btn bottom"></div>
        <div class="btn bottom_left"></div>
        <div class="btn left"></div>
        <div class="btn left_top"></div>
        </div>
        </div>
        <div class="rightArea">
        <div class="btnBlock btnXY">
        <div class="btn btnX"></div>
        <div class="btn btnY"></div>
        </div>
        <div class="btnBlock btnAB">
        <div class="btn btnA"></div>
        <div class="btn btnB"></div>
        </div>
        </div>
        <div class="btnTop btnL"></div>
        <div class="btnTop btnR"></div>
    </div>
</div>

##CSS

body {
    margin: 0;
    line-height: 1.5;
    font-family: "游ゴシック", YuGothic, "ヒラギノ角ゴ ProN W3", "Hiragino Kaku Gothic ProN", "メイリオ", Meiryo, sans-serif;
    font-size: 12px;
    -webkit-text-size-adjust: 100%;
}

div, p, ul, ol, dl, li, dt, dd {
    margin: 0;
    padding: 0;
    font-size: 100%;
}

.wrapper {
    width: 550px;
    overflow: hidden;
    height: 500px;
}
/* ===== controller ===== */
.controller {
    position: relative;
    top: 30px;
    left: 130px;
    width: 272px;
    height: 180px;
    background-color: #b2b3b4;
    color: #4b4665;
    font-family: monospace;
    z-index: 2;
}
.controller:before,
.controller:after {
    position: absolute;
    display: block;
    width: 208px;
    height: 208px;
    content: " ";
    background-color: #b2b3b4;
    border-radius: 104px;
    z-index: 1;
}
.controller:before {
    top: 0;
    left: -104px;
}
.controller:after {
    top: 0;
    right: -104px;
}

.controller .ci {
    position: absolute;
    top: 8px;
    left: 44px;
    width: 160px;
    height: 2em;
    line-height: 1.2;
    padding-top: 10px;
    padding-left: 34px;
    color: #4f4b64;
    font-size: 12px;
    z-index: 3;
}
.controller .logomark span {
    position: absolute;
    display: block;
    background-color: #4f4b64;
    z-index: 3;
}
.controller .logomark .part1 {
    top: 20px;
    left: 2px;
    width: 10px;
    height: 8px;
    border-radius: 10px / 8px;
    z-index: 5;
}
.controller .logomark .part2 {
    top: 26px;
    left: 11px;
    width: 10px;
    height: 8px;
    border-radius: 10px / 8px;
    z-index: 5;
}
.controller .logomark .part3 {
    top: 14px;
    left: 8px;
    width: 10px;
    height: 10px;
    border-radius: 10px;
    z-index: 3;
}
.controller .logomark .part3:before {
    position: absolute;
    left: -4px;
    bottom: -4px;
    display: block;
    width: 10px;
    height: 10px;
    background-color: #b2b3b4;
    border-radius: 10px;
    z-index: 4;
    content: " ";
}
.controller .logomark .part4 {
    top: 20px;
    left: 17px;
    width: 10px;
    height: 10px;
    border-radius: 10px;
    z-index: 3;
}
.controller .logomark .part4:before {
    position: absolute;
    left: -4px;
    bottom: -4px;
    display: block;
    width: 10px;
    height: 10px;
    background-color: #b2b3b4;
    border-radius: 10px;
    z-index: 4;
    content: " ";
}

.controller .leftArea {
    position: absolute;
    top: 44px;
    left: -64px;
    width: 120px;
    height: 120px;
    background-color: #bbbcbd;
    border-radius: 60px;
    box-shadow: 1px 1px 1px #8b8d8c inset;
    z-index: 3;
}
.controller .clossKey {
    position: absolute;
    top: 18px;
    left: 18px;
    width: 84px;
    height: 84px;
    z-index: 3;
}
.controller .clossKey:before,
.controller .clossKey .btn {
    position: absolute;
    width: 28px;
    height: 28px;
    background-color: #505856;
    content: " ";
    z-index: 4;
}
.controller .clossKey:before {
    top: 26px;
    left: 26px;
    width: 34px;
    height: 34px;
    border-radius: 5px;
    z-index: 5;
}
.controller .clossKey:after {
    position: absolute;
    top: 32px;
    left: 32px;
    width: 20px;
    height: 20px;
    background-color: #4a5250;
    border-radius: 10px;
    box-shadow: -3px -3px 5px #6a726f inset;
    content: " ";
    z-index: 6;
}
.controller .clossKey .btn:before {
    position: absolute;
    width: 0;
    height: 0;
    border-top: 0 solid transparent;
    border-bottom: 20px solid #4a5250;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    margin-left: 14px;
    content: " ";
    pointer-events: none;
    z-index: 5;
}
.controller .clossKey .btn:after {
    position: absolute;
    width: 0;
    height: 0;
    border-top: 0 solid transparent;
    border-bottom: 16px solid #505856;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    margin-left: 10px;
    content: " ";
    pointer-events: none;
    z-index: 6;
}
.controller .clossKey .top {
    top: 0;
    left: 28px;
    box-shadow: 1px 0 1px #000;
}
.controller .clossKey .top:active {
    box-shadow: 1px 1px 1px #000 inset;
}
.controller .clossKey .top:before {
    top: 4px;
    left: -8px;
}
.controller .clossKey .top:after {
    top: 6px;
    left: 0;
}
.controller .clossKey .right {
    top: 28px;
    left: 56px;
    box-shadow: 1px 1px 1px #000;
}
.controller .clossKey .right:active {
    box-shadow: 1px 1px 1px #000 inset;
}
.controller .clossKey .right:before {
    top: 4px;
    left: -8px;
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
}
.controller .clossKey .right:after {
    top: 6px;
    left: 0;
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
}
.controller .clossKey .bottom {
    bottom: 0;
    left: 28px;
    box-shadow: 1px 1px 1px #000;
}
.controller .clossKey .bottom:active {
    box-shadow: 1px 1px 1px #000 inset;
}
.controller .clossKey .bottom:before {
    top: 4px;
    left: -8px;
    -webkit-transform: rotate(180deg);
    transform: rotate(180deg);
}
.controller .clossKey .bottom:after {
    top: 6px;
    left: 0;
    -webkit-transform: rotate(180deg);
    transform: rotate(180deg);
}
.controller .clossKey .left {
    top: 28px;
    left: 0;
    box-shadow: 0 1px 1px #000;
}
.controller .clossKey .left:active {
    box-shadow: 1px 1px 1px #000 inset;
}
.controller .clossKey .left:before {
    top: 4px;
    left: -8px;
    -webkit-transform: rotate(270deg);
    transform: rotate(270deg);
}
.controller .clossKey .left:after {
    top: 6px;
    left: 0;
    -webkit-transform: rotate(270deg);
    transform: rotate(270deg);
}

.controller .clossKey .top_right,
.controller .clossKey .right_bottom,
.controller .clossKey .bottom_left,
.controller .clossKey .left_top {
    background: none;
    box-shadow: none;
}

.controller .clossKey .top_right:before,
.controller .clossKey .top_right:after,
.controller .clossKey .right_bottom:before,
.controller .clossKey .right_bottom:after,
.controller .clossKey .bottom_left:before,
.controller .clossKey .bottom_left:after,
.controller .clossKey .left_top:before,
.controller .clossKey .left_top:after {
    display: none;
}

.controller .clossKey .top_right {
    top: 0;
    right: -2px;
    -webkit-border-top-right-radius: 42px;
    border-top-right-radius: 42px;
}
.controller .clossKey .right_bottom {
    bottom: -2px;
    right: -2px;
    -webkit-border-bottom-right-radius: 42px;
    border-bottom-right-radius: 42px;
}
.controller .clossKey .bottom_left {
    bottom: 0;
    left: 0;
    -webkit-border-bottom-left-radius: 42px;
    border-bottom-left-radius: 42px;
}
.controller .clossKey .left_top {
    top: 0;
    left: 0;
    -webkit-border-top-left-radius: 42px;
    border-top-left-radius: 42px;
}

.controller .rightArea {
    position: absolute;
    top: 12px;
    right: -92px;
    width: 180px;
    height: 180px;
    background-color: #8b9597;
    border-radius: 90px;
    z-index: 3;
}

.controller .subBtn {
    position: absolute;
    width: 40px;
    height: 10px;
    background-color: #515755;
    border-radius: 10px;
    box-shadow: 1px -1px 0 #000;
    -webkit-transform: rotate(145deg);
    transform: rotate(145deg);
    z-index: 3;
}

.controller .subBtn:active {
    box-shadow: 0 -1px 1px #000 inset;
}

.controller .rightArea .btnBlock {
    position: absolute;
    width: 120px;
    height: 52px;
    background-color: #afb3b1;
    border-radius: 40px;
    -webkit-transform: rotate(140deg);
    transform: rotate(140deg);
}

.controller .rightArea .btnXY {
    top: 40px;
    right: 48px;
}

.controller .rightArea .btnAB {
    bottom: 40px;
    right: 10px;
}

.controller .rightArea .btn {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 40px;
    box-shadow: 0 -1px 2px #000;
}

.controller .rightArea .btn:active {
    box-shadow: 0 -1px 2px #666 inset;
}

.controller .rightArea .btnA {
    bottom: 6px;
    left: 6px;
    background-color: #c92c13;
}

.controller .rightArea .btnB {
    top: 6px;
    right: 6px;
    background-color: #e9bc25;
}

.controller .rightArea .btnX {
    bottom: 6px;
    left: 6px;
    background-color: #2547b3;
}

.controller .rightArea .btnY {
    top: 6px;
    right: 6px;
    background-color: #098762;
}

.controller .btnTop {
    position: absolute;
    top: -6px;
    width: 60px;
    height: 10px;
    background-color: #b2b3b4;
    border-radius: 60px / 10px;
    z-index: 1;
}
.controller .btnTop.btnL {
    left: 0;
}
.controller .btnTop.btnL:active {
    margin-top: 1px;
}
.controller .btnTop.btnR {
    right: 0;
}
.controller .btnTop.btnR:active {
    margin-top: 1px;
}


.controller .selectBtn {
    top: 120px;
    left: 80px;
}

.controller .startBtn {
    top: 120px;
    left: 130px;
}

.controller .selectBtn:before,
.controller .startBtn:before {
    position: absolute;
    display: block;
    width: 10em;
    height: 1em;
    font-size: 11px;
    -webkit-transform: rotate(-145deg);
    transform: rotate(-145deg);
    pointer-events: none;
}

.controller .selectBtn:before {
    bottom: 3.8em;
    left: -4.5em;
    content: "SELECT";
}

.controller .startBtn:before {
    bottom: 3.8em;
    left: -4.5em;
    content: "START";
}

これにJS載せてボタンポチポチできるようにすればゲームできるかも。
http://www.blurblue.com/sfc/