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CSS

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HTML 

              
                  
<div class="controls">
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            <circle class="st33" cx="631.9" cy="230.9" r="3.7"/>
          </g>
          <g>
            <circle class="st33" cx="624.5" cy="195.4" r="5.5"/>
          </g>
          <g>
            <circle class="st33" cx="663.2" cy="170.7" r="5.5"/>
          </g>
          <g>
            <circle class="st33" cx="661.4" cy="209" r="5.5"/>
          </g>
        </g>
      </g>
    </g>
  </g>
  <g id="comets">

		<line stroke="#FFD066" mask="url(#Mask1)" x1="0" y1="581" x2="737.7" y2="0.3"/>
		<line stroke="#FFD066" mask="url(#Mask2)" x1="3.5" y1="456" x2="572.5" y2="8.1"/>
		<line stroke="#FFD066" mask="url(#Mask3)" x1="381.3" y1="600" x2="800" y2="270.4"/>
  
  </g>
</g>
<g id="board">
  <g id="path">
    <g>
      <path class="st38" d="M122,112.2c0.2,0.1,0.3,0.1,0.5,0.2"/>
      <path class="st39" d="M128.1,114.3c149.5,51.1,280.5-24.7,466-13.8c188,11,159,212,6,188s-276-48-385-22s-113,180,26,193
        s208.8-83.5,331-50c45.8,12.5,102.3,63.8,116,82.1"/>
      <path class="st38" d="M689.8,494.1c0.1,0.1,0.2,0.3,0.3,0.4"/>
    </g>
  </g>
</g>

<g id="generated-steps"></g>
</svg>
!

CSS 

              
                $void : #002a3f

body, html
  margin: 0
  padding: 0
  background-color: $void
  overflow: hidden
  font-family: 'Montserrat', sans-serif
  display: flex
  flex-direction: column
  justify-content: center

.controls
  position: fixed
  z-index: 10
  font-size: 0
  top: 10px
  right: 10px
  button,
  div
    display: inline-block
    height: 33px
    background-color: #fff
    border: none
    padding: 4px 8px
    margin: 0 1px
    box-sizing: border-box
    vertical-align: top
    line-height: 26px
    font-size: 1rem
  div
    min-width: 50px
    text-align: center
    font-variant-numeric: tabular-nums
  button
    font-size: 1.3rem
    padding-top: 0
    cursor: pointer
    transition: background-color .2s ease
    &:first-child
      border-radius: 6px 0 0 6px
    &:last-child
      border-radius: 0 6px 6px 0
    &:focus
      outline: none
    &.clicked
      transition: none
      background-color: #52D1C5

svg
  max-width: 100vw
  max-height: 100vh
  margin-top: 50vh
  transform: translateY(-50%)
  overflow: visible

  #Mask1
    polygon
      animation: comet 8s infinite ease-out 
  #Mask2
    polygon
      animation: comet 11s infinite -2s ease-out 
  #Mask3
    polygon
      animation: comet 9s infinite -4s ease-out 

  #craters > g
    animation: earthrotation 80s infinite linear
    transform-origin: 8% 12%

  #venuscraters > g
    animation: earthrotation 35s infinite linear reverse
    transform-origin: 80% 32%
  
  #sputnik
    animation: earthrotation 360s infinite linear reverse
    transform-origin: 96% 97%
  
  #rocket 
    animation: bounce 60s infinite -30s ease-in-out alternate
    > g
      animation: earthrotation 120s infinite linear
      transform-origin: 82% 75%

  #gallaxy > *
    stroke-dasharray: 1 4
    animation: galactic 2s infinite linear
    &:nth-child(4),
    &:nth-child(5)
      animation: galactic 1s infinite linear reverse

  #lands > path
    animation: earthrotation 90s infinite linear
    transform-origin: 102% 65%

  #sun
    animation: sundance 2s infinite ease alternate
    transform-origin: 14.5% 80%
    #rays
      polygon:not(#main)
        position: relative
        animation-name: shining
        animation-duration: 2.5s
        animation-timing-function: linear
        animation-iteration-count: infinite        
        transform-origin: 14.5% 80%
      @for $i from 1 through 4
        #ray_#{$i}_
          animation-delay: -1s * $i

@keyframes bounce
  from
    transform: translate3d(0, 0, 0)
  to
    transform: translate3d(0, -200px, 0)
@keyframes comet
  0%
    transform: translate3d(0, 0, 0)
    opacity: 1
  10%
    opacity: 0
    transform: translate3d(-120px, 95px, 0)
  100%
    opacity: 0
    transform: translate3d(-600px, 475px, 0)

@keyframes galactic
  from
    stroke-dashoffset: 0
  to
    stroke-dashoffset: 5

@keyframes earthrotation
  from
    transform: rotate(0deg)
  to
    transform: rotate(360deg)

@keyframes sundance
  from
    transform: rotate(0deg)
  to
    transform: rotate(6deg)

@keyframes shining
  0%
    transform: scale(1)
  25%
    transform: scale(1.1)
  75%
    transform: scale(.8)
  100%
    transform: scale(1)
!

JS 

              
                // Bezier curves constructor

var Beziercurve = function(startPt,controlPt1,controlPt2,endPt){
  this.startPt = startPt;
  this.controlPt1 = controlPt1;
  this.controlPt2 = controlPt2;
  this.endPt = endPt;
  this.length = this.getLength();
}

// Bezier curves methods

Beziercurve.prototype.getXY = function(percent){
  CubicN = function(pct, a,b,c,d) {
    var t2 = pct * pct;
    var t3 = t2 * pct;
    return a + (-a * 3 + pct * (3 * a - a * pct)) * pct
      + (3 * b + pct * (-6 * b + b * 3 * pct)) * pct
      + (c * 3 - c * 3 * pct) * t2
      + d * t3;
  };
  var x=CubicN(percent,this.startPt.x,this.controlPt1.x,this.controlPt2.x,this.endPt.x);
  var y=CubicN(percent,this.startPt.y,this.controlPt1.y,this.controlPt2.y,this.endPt.y);
  return({x:Math.floor(x),y:Math.floor(y)});
};

Beziercurve.prototype.getLength = function(){
  var foo = [];
  var length = 0;
  for(var i = 0; i <= 30; i++){
    foo[i] = this.getXY(i/30);
  }
  for(var i = 1; i <= 30; i++){
    var a = foo[i-1].x - foo[i].x;
    var b = foo[i-1].y - foo[i].y;
    length += Math.sqrt( a*a + b*b );
  }
  return length;
}

// board constructor

var BoardPassGenerator = function(steps, coordinates) {

  var self = this;
  this.numberSteps = 18;
  this.snap = Snap("#generated-steps");
  this.sellingCount = 0;
  this.steps = steps;
  this.counter = document.querySelector('.controls .currentcount');

  // we create instances of : Beziercurve

  this.bezierCurves = [];
  coordinates.forEach(function(coordinate, i){
    self.bezierCurves[i] = new Beziercurve(coordinate[0], coordinate[1], coordinate[2], coordinate[3]);
  });

  // generate an array indexing all the sections lengths :
  this.pathSections = [0];
  for (var i = 0; i < this.bezierCurves.length; i++) {
    this.pathSections.push(this.bezierCurves[i].length + this.pathSections[i]);
  }

  // then we calculate the total length of the curve
  this.totalLength = this.pathSections[this.pathSections.length-1];

  // initialize the board
  this.init = function (cb) {
    // reset
    this.sellingCount = 0;
    document.getElementById("generated-steps").innerHTML = "";
    this.counter.innerHTML = this.numberSteps;

    this.drawSteps(this.numberSteps);
    if(cb && typeof cb === "function") cb();
  };

  this.drawSteps = function(j) {
    for (var i = 0; i <= j; i++) {
      var xy, section, sectionPercent;
      var distanceFromStart = i / j * this.totalLength;
      var pathSections = this.pathSections;
      // find which section 'distanceFromStart' belongs to
      section = pathSections.filter(function(value){return value <= distanceFromStart}).length - 1;
      // make sure we don't go beyond the array for the last step!
      section = Math.min(section, pathSections.length - 2)

      sectionPercent = (section > 0) ? ((distanceFromStart - pathSections[section]) / (pathSections[section +1] - pathSections[section])) : (distanceFromStart / pathSections[section + 1]);

      xy=this.bezierCurves[section].getXY(sectionPercent);

      this.drawStep(xy, i);
    }
  };

  this.drawStep = function(point, index) {

    // here comes the magic of snap.svg
    // we get the kind of the step (regular, mystery, star, checkpoint)
    // then we draw the step at the computed position

    var step;

    switch (index) {
      case 0:
      step = "start";
      break;
      case this.numberSteps:
      step = "finish";
      break;
      default:
      step = this.steps[index % this.steps.length];
    }

    if(step === "checkpoint"){
      this.sellingCount++;
      var count = this.snap.text(-8, 10, this.sellingCount)
      var icon = this.snap.use(step + "-mtx");
      var group = this.snap.g(icon, count);
      count.attr({
        style: "fill: #002A3F;font-size:22.1472px;",
        transform: "matrix(1,0,0,1,3,-2)"
      })
      group.attr({
        transform: "translate("+point.x+", "+point.y+")"
      })
    } else {
      var icon = this.snap.use(step + "-mtx");
      icon.attr({
        transform: "translate("+point.x+", "+point.y+")"
      });
    }

  };

}

/**********************/
/* call the generator */
/**********************/

window.onload = function() {

  var steps = [
      "checkpoint",
      "regular",
      "star",
      "regular",
      "mystery"
  ];
  
  var coordinates = [
    [{x:690.5, y:495.0}, {x:681.5, y:480.0}, {x:621.0, y:423.3}, {x:572.5, y:410.0}],
    [{x:572.5, y:410.0}, {x:450.4, y:376.5}, {x:380.5, y:473.0}, {x:241.5, y:460.0}],
    [{x:241.5, y:460.0}, {x:102.5, y:447.0}, {x:106.5, y:293.0}, {x:215.5, y:267.0}],
    [{x:215.5, y:267.0}, {x:324.5, y:241.0}, {x:447.5, y:265.0}, {x:600.5, y:289.0}],
    [{x:600.5, y:289.0}, {x:753.5, y:313.0}, {x:782.5, y:112.0}, {x:594.5, y:101.0}],
    [{x:594.5, y:101.0}, {x:406.5, y:90.0}, {x:274.5, y:168.0}, {x:122.5, y:112.7}],
  ];
  
  var boardPassGenerator = new BoardPassGenerator(steps, coordinates);
  var moreButton = document.getElementById('buttonmore');
  var lessButton = document.getElementById('buttonless');

  function buttonEvent(isIncrement, target){
    boardPassGenerator.numberSteps += isIncrement? 1 : -1;
    boardPassGenerator.init();
    target.classList.add('clicked')
    setTimeout(function(){target.classList.remove('clicked')}, 100);
  }
  
  moreButton.addEventListener('click', function(){
    buttonEvent(true, this);
  });

  lessButton.addEventListener('click', function(){
    buttonEvent(false, this);
  });

  boardPassGenerator.init();

};
!
999px

Console