body {
  margin: 0;
  background: #ff7800;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
div {
  user-select: none;
}
.health {
  position: absolute;
  font-family: courier;
  color: white;
  font-weight: bold;
  border: 5px solid red;
  font-size: 35px;
  text-align: center;
  transform: translateX(-50%) translateY(-50%);
}
.instructions {
  color: rgba(0, 0, 0, 0.5);
  font-family: Courier;
  position: absolute;
  left: 50%;
  top: 80%;
  transform: translateX(-50%) translateY(-50%);
  z-index: 0;
}
.instructions div {
  text-align: center;
}
.game {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.game:hover {
  cursor: url('http://www.reliablehotwater.com.au/wp-content/themes/reliable/images/boll01.png'), pointer;
}
.game .player {
  position: absolute;
  background: white;
  border-radius: 12%;
}
.game .bullet {
  position: absolute;
  background: white;
  border-radius: 15%;
}
.game .enemy {
  position: absolute;
  background: #120158;
  border-radius: 50%;
  transform: translateX(-50%) translateY(-50%);
}
.game .dust {
  position: absolute;
  background: white;
  border-radius: 50%;
  transform: translateX(-50%) translateY(-50%);
}
.interface .player-health {
  position: absolute;
  left: 5px;
  bottom: 5px;
  display: flex;
  width: 250px;
  height: 35px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(0, 0, 0, 0.2);
}
.interface .player-health .amount {
  width: 100%;
  height: 100%;
  background: rgba(255, 0, 0, 0.7);
}
.interface .score {
  position: absolute;
  bottom: 5px;
  right: 5px;
  font-family: courier;
  font-size: 35px;
  color: white;
  display: flex;
}
.lose-interface {
  z-index: 3;
  display: none;
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.lose-interface .text {
  font-family: courier;
  font-size: 50px;
  color: white;
  display: flex;
}
.lose-interface .text.score {
  font-size: 35px;
}
.lose-interface .restart-button {
  font-family: courier;
  color: white;
  border: 3px solid white;
  font-size: 22px;
  padding: 5px 35px;
  margin-top: 15px;
}
.lose-interface .restart-button:hover {
  cursor: pointer;
  background: white;
  color: black;
}