body {
    background: black;
}

#canvas {
    background: purple;
    position: absolute;
    top: 55%;
    left: 50%;
    transform: translate(-50%,-50%);
    border: 5px solid white;
}

#playerImage {
display: none;
}

#trampolineImage {
display: none;
}

#backgroundImage {
display: none;
}


#navbar {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: steelblue;
  border: 2px solid royalblue;
}

#navbar li {
   float: left;
}

#navbar li a {
  display: block;
  color: white;
  text-align: center;
  padding: 7px 16px;
}