style.css

*{
    margin: 0;
    padding: 0;
}

body{
    overflow: hidden;
}

.sky{
    height: 100vh;
    width: 100%;
    background-image: url(background.jpg);
    background-repeat: no-repeat;
    position: absolute;
    background-size: cover;
}

.trees{
    height: 100vh;
    /* width: 800vw; */
    width: 100%;
    background-image: url(trees.png);
    /* background-repeat: repeat-x; */
    background-repeat: no-repeat;
    /* background-size: cover; */
    position: absolute;
    top: -133px;
    /* animation: treeMove 5s linear infinite; */
}

.track{
    height: 30vh;
    width: 800vw;
    background-image: url(track.png);
    background-repeat: repeat-x;
    position: absolute;
    top: 70vh;
    animation: carMove 3s linear infinite;
}

.car{
    height: 100px;
    width: 380px;
    background-image: url(car_body.png);
    background-size: cover;
    background-repeat: no-repeat;
    position: absolute;
    left:52vh;
    bottom: 20vh;
    animation: carShake 3s linear infinite;
}

.wheel_left img{
    width: 70px;
    position: relative;
    left: 46px;
    top:43px;
    animation: wheelRotation .2s linear infinite;
}

.wheel_right img{
    width: 72px;
    position: relative;
    left: 237px;
    bottom:31px;
    animation: wheelRotation .2s linear infinite;
}

@keyframes wheelRotation{
    100%{
        transform: rotate(360deg);
    }
}

@keyframes carMove{
    100%{
        transform: translateX(-500vw);
    }
}

@keyframes treeMove{
    100%{
        transform: translateX(-500vw);
    }
}

@keyframes carShake{
    0%{
        transform: translateY(-5px);
    }
    50%{
        transform: translateY(5px);
    }
    100%{
        transform: translateY(-5px);
    }
}

@keyframes shakeBody{
    0%{
        transform: translateY(-5px);
    }
    50%{
        transform: translateY(5px);
    }
    100%{
        transform: translateY(-5px);
    }
}