body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: Arial, sans-serif;
    background-color: #000;
    color: #fff;
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    background-image: url('https://cdn.pixabay.com/photo/2016/08/14/14/58/pokemon-1593048_1280.jpg');
    background-size: cover;
    background-position: center;
}

#player {
    position: absolute;
    bottom: 20px;
    left: calc(50% - 20px);
    width: 40px;
    height: 40px;
    background-image: url('https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/25.png');
    background-size: cover;
}

.bullet {
    position: absolute;
    width: 5px;
    height: 5px;
    background-color: yellow;
    border-radius: 50%;
}

.enemy {
    position: absolute;
    width: 40px;
    height: 40px;
    background-size: cover;
    background-repeat: no-repeat;
}

#energy {
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 20px;
    color: #00ff00;
}

#timer {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 20px;
    color: #00ff00;
}