Style.css

.b {
    width: 100%;
    height: 100vh;
    background-image: url("Images/BG.png");
    background-size: cover;

    overflow-x: hidden;
    position: absolute;

    background-repeat: repeat-x;
}

.body {
    margin: 0px;
}

.ground {
    position: absolute;
    width: 100%;
    height: 10vh;
    margin-top: 560px;
       
}

.barrier {
    position: absolute;
    height: 100px;
    margin-top: 460px;
}

.santa {
    position: absolute;
    height: 256px;
    margin-top: 332px;
}

.score {
    position: absolute;
    font-family: "Times New Roman";
    font-size: 90px;
    color: rgb(0, 250, 109);
    font-weight: bold;
    margin-top: 20px;
    margin-left: 60px;
}

.gover {
    position: absolute;
    height: 100vh;
    width: 100%;
    background-color: blue;

    font-family: "Times New Roman";
    font-size: 100px;
    font-weight: bold;
    color: white;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    opacity: 0.9;
    visibility: hidden;
}

.btn {
    width: 500px;
    height: 55px;
    background-color: orangered;
    color: black;
    border: thin;
    font-family: "Times New Roman";
    font-size: 30px;
    font-weight: bold;
    border-radius: 25px;
    cursor: pointer;
}

.btn:hover{
    background-color:violet;
    color: purple;
    transition-duration: 0.2s;
}

.sky {
    position: absolute;
    height: 160px;
    margin-top: 25px;
}