s.css

body {
    text-align: center;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

.centered {
    text-align: center;
}

.centered * {
    /*display: inline-block;*/
    position: absolute;
    height: 100px;
    /*width: 100px;*/
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    font-size: 70px;
    cursor: pointer;
}

#g:after {
    content: "g?";
    cursor: pointer;
}

#g:hover:after {
    content: "g";
}

#imageMinimize {
    border: 1px solid #aaa;
}

.arrow {
    width: 50px;
    position: fixed;
    display: none;
}

.arrow.arrow-right {
    top: 0;
    bottom: 0;
    margin: auto;
    right: 15px;
}

.arrow.arrow-bottom {
    left: 0;
    right: 0;
    margin: 0 auto;
    top: auto;
    bottom: 15px;
    transform: rotate(90deg);
}

.arrow.arrow-bottom.to-bottom {
    transform: rotate(270deg);
    -webkit-filter: hue-rotate(90deg); /* Chrome, Safari, Opera */
    filter: hue-rotate(90deg);
}
.arrow.arrow-right.to-right {
    transform: rotate(180deg);
    -webkit-filter: hue-rotate(90deg); /* Chrome, Safari, Opera */
    filter: hue-rotate(90deg);
}


#startGame:after {
    content: "Merem?";
}

#startGame:hover:after {
    content: "Merem";
}

#catSpace {
    display: none; 
    position: relative;
    width: 100%;
    height: 100%;
}

#cat {
    position: absolute;
    width: auto; 
    height: 70px;
    -webkit-transition: transform 0.2s ease-in-out 0s;
    transition: transform 0.2s ease-in-out 0s;
}

.direction-0 {
    -ms-transform: rotate(0deg); /* IE 9 */ 
    -webkit-transform: rotate(0deg); /* Chrome, Safari, Opera */
    transform: rotate(0deg);
}


.direction-1 {
    -ms-transform: rotate(90deg); /* IE 9 */ 
    -webkit-transform: rotate(90deg); /* Chrome, Safari, Opera */
    transform: rotate(90deg);
}

.direction-2 {
    -moz-transform: scaleX(-1);
    -o-transform: scaleX(-1);
    -webkit-transform: scaleX(-1);
    transform: scaleX(-1);
    filter: FlipH;
    -ms-filter: "FlipH";
}

.direction-3 {
    -ms-transform: rotate(270deg); /* IE 9 */ 
    -webkit-transform: rotate(270deg); /* Chrome, Safari, Opera */
    transform: rotate(270deg);
}

#ip {
    display: none;
}