body {
    font-family: Arial, sans-serif;
    background-color: #e1f376;
    text-align: center;
    margin: 0;
    padding: 20px;
}

h1 {
    font-size: 2em;
    margin-bottom: 20px;
}

.game-area {
    position: relative;
    width: 300px;
    height: 400px;
    background-color: #d3d3d3;
    border: 2px solid #333;
    margin: 0 auto 20px;
    overflow: hidden;
    border-radius: 10px;
}

.balloon {
    width: 40px;
    height: 60px;
    background-color: red;
    border-radius: 50%;
    position: absolute;
    top: 10px;
    left: calc(50% - 20px);
}

.cannon {
    width: 50px;
    height: 50px;
    background-color: #333;
    position: absolute;
    bottom: 10px;
    left: calc(50% - 25px);
}

.controls {
    margin-bottom: 20px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    margin: 0 10px;
    cursor: pointer;
}

#message {
    font-size: 18px;
    color: green;
}