*{
    margin: 0;
    padding: 0;
}

html{
    height: 100%;
}

body{
    background-image: radial-gradient(#1f2b94,#151B54);
}

#game{
    width: 400px;
    height: 500px;
    background: #87CEEB;
    border: 1px solid #181818;
    margin: auto;
    overflow: hidden;
}

#block{
    width: 50px;
    height: 500px;
    background-color: black;
    position: relative;
    left: 400px;
    animation: block 2s infinite linear;
}

@keyframes block {
    0%{left: 400px;}
    100%{left: -50px;}
}

#hole{
    width: 50px;
    height: 150px;
    background-color: #87CEEB;
    position: relative;
    left: 400px;
    top: -500px;
    animation: block 2s infinite linear;
}

#character{
    width: 20px;
    height: 20px;
    background-color: red;
    position: absolute;
    top: 100px;
    border-radius: 50%;
}


@media only screen and (max-width: 600px){
    #game{
        width: 90%;
        background: #87CEEB;
        border: 1px solid #181818;
        margin: auto;
        overflow: hidden;
    }
}