style.css

* {
    margin: 0;
    padding: 0;
}

body {
    background-color: white;
    overflow: hidden;
}

.gameContainer {
    background-image: url(background.jpg);
    background-image: no-repeat;
    background-size: 100vw 100vh;
    width: 100%;
    height: 100vh;
}

.HP {
    background-image: url(logo3.png);
    background-repeat: no-repeat;
    background-size: cover;
    width: 109px;
    height: 109px;
    position: absolute;
    bottom: 0;
    left: 12px;
    /* top: 68vh; */
}

.apple {
    background-image: url(logo1.png);
    background-repeat: no-repeat;
    background-size: cover;
    width: 110px;
    height: 130px;
    position: absolute;
    bottom: 0;
    left: 44vw;
    /* top: 350px; */
}

.animateHP {
    animation: HP 0.7s linear;
}

.obstacleAni {
    animation: obstacleAni 3s linear infinite;
}

.gameOver {
    position: relative;
    top: 93px;
    font-size: 40px;
    font-family: cursive;
    text-align: center;
    color: black;
    font-weight: bolder;
    margin: 0vh;
}

#scorecont {
    position: absolute;
    right: 60px;
    color: white;
    font-weight: bold;
    font-size: 20px;
    border-radius: 100px;
    top: 20px;
    padding: 10px;
    border: 2px solid black;
    font-family: cursive;
    width: 150px;
}

@keyframes HP {
    0% {
        bottom: 0;
    }
    50% {
        bottom: 422px;
    }
    100% {
        bottom: 0;
    }
}

@keyframes obstacleAni {
    0% {
        left: 100vw;
    }
    100% {
        left: -10vw;
    }
}