style.css

.center {
    text-align: center;
}

#controller {
    position: absolute;
    left: 100px;
}

#game .toola {
    float: left;
}

#game #toolslc {
    display: none;
    position: absolute;
    border: 4px solid #1b43e1;
    background-color: #fff;
    width: 163px;
    padding: 8px;
}

#game #toolslcifs {
    display: none;
    position: absolute;
    border: 4px solid #1b43e1;
    background-color: #fff;
    width: 150px;
    padding: 8px;
}

#game #toolslcifs .toolifs {
    float: left;
    border: 1px solid;
    margin: 3px;
}

#game .toolifs {
    width: 35px;
    height: 25px;
    cursor: hand;
}

#game .tool {
    float: left;
    width: 35px;
    height: 35px;
    cursor: hand;
}

#game #toolslc .tool {
    margin: 5px;
}

#game .tool:hover {
    outline: 4px solid #00C7FF;
}

#game .toolifs:hover {
    outline: 4px solid #ff8100;
}

#game button {
    position: absolute;
    left: -100px;
}

#game #btn_start {
    font-size: 40px;
    border-radius: 15px;
}

span.score-star {
    font-size: 60px;
    color: #FF0;
    text-shadow: 0 8px 10px #F7C810;
    /*-webkit-animation: bianxiao 800ms;*/
}

@keyframes bianxiao {
    from {
        font-size: 500px
    }
    to {
        font-size: 60px
    }
}