#game-container {
  position: relative;
  width: 100vh;
  height: 0;
  padding-bottom: 75%; /* 4:3 aspect ratio */
  background-color: transparent;
  margin: auto;
  overflow: hidden;
  border: 2px solid black; /* Add border */
}

.pdf,
.player,
.projectile {
  position: absolute;
}
.pdf {
  width: 50px;
  height: 50px;
}
.player {
  width: 50px;
  height: 50px;
}
.projectile {
  background-color: black !important;
  width: 5px;
  height: 10px;
}
#score,
#level,
#lives,
#high-score {
  color: black;
  font-family: sans-serif;
  position: absolute;
  font-size: calc(14px + 0.25vw); /* Reduced font size */
}
#score {
  top: 10px;
  left: 10px;
}
#lives {
  top: 10px;
  left: calc(9vw); /* Adjusted position */
}
#high-score {
  top: 10px;
  left: calc(14vw); /* Adjusted position */
}
#level {
  top: 10px;
  right: 10px;
}