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HTML 

              
                <html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Epic Race</title>
</head>
<body>
  <div id="drum" class="drum">
    <div id="broasca" class="broasca">
      <div class="cap"></div>
      <div class="picior"></div>
      <div class="picior"></div>
      <div class="coada"></div>
    </div>
    
    <div id="bolovan" class="bolovan"></div>
  </div>
</body>
</html>
!

CSS 

              
                body { margin: 0; padding: 0; }
.drum { width: 100vw; height: 50vh; margin-top: 25vh; background: gray; position: relative; }

.broasca { width: 200px; height: 70px; background: lime; border-radius: 100px 100px 0 0; position: absolute; top: 50px; }

.cap { width: 30px; height: 30px; position: relative; left: 175px; background: black; border-radius: 30px; top: 50px; }

.bolovan { position: absolute; background: brown; width: 30px; height: 20px; border-radius: 30px; }
!

JS 

              
                var broasca = document.getElementById("broasca");
var bolovan = document.getElementById("bolovan");
var pozitiah = 0;
var pozitiav = 50;

var toleranta = 15;

var pozitie_bolovan_h = 520;
var pozitie_bolovan_v = 140;

var stanga_minim_b = pozitie_bolovan_h + toleranta;
var stanga_maxim_b = pozitie_bolovan_h + 30 - toleranta;
var top_minim_b = pozitie_bolovan_v + toleranta;
var top_maxim_b = pozitie_bolovan_v + 20 - toleranta;

var stanga_minim_broasca = 0;
var stanga_maxim_broasca = 0 + 200;

var top_minim_broasca = 50;
var top_maxim_broasca = 50 + 70;

var coliziune_pe_verticala = false;
var coliziune_pe_orizontala = false;


document.addEventListener("keydown", miscabroasca);
bolovan.setAttribute("style", "left: " + pozitie_bolovan_h + "px; top: " + pozitie_bolovan_v + "px;");


function miscabroasca (event) {
  
  coliziune_pe_orizontala = false;
  coliziune_pe_verticala = false;
  
  var tasta = event.keyCode;

  if(tasta == 39) {
    if(pozitiah < 700) {
      pozitiah = pozitiah + 10;
      broasca.setAttribute("style", "left: " + pozitiah + "px; " + "top: " + pozitiav + "px;");
    }
  }
  if(tasta == 37) {
    if(pozitiah >= 0) {
      pozitiah = pozitiah - 10;
      broasca.setAttribute("style", "left: " + pozitiah + "px; " + "top: " + pozitiav + "px;");
    }
  }

  if(tasta == 38) {
    if(pozitiav >= 0) {
      pozitiav = pozitiav - 10;
      broasca.setAttribute("style", "left: " + pozitiah + "px; " + "top: " + pozitiav + "px;");
    }
  }

  if(tasta == 40) {
    if(pozitiav < 180) {
      pozitiav = pozitiav + 10;
      broasca.setAttribute("style", "left: " + pozitiah + "px; " + "top: " + pozitiav + "px;");
    }
  }
  
  stanga_minim_broasca = pozitiah;
  stanga_maxim_broasca = pozitiah + 200;
  top_minim_broasca = pozitiav;
  top_maxim_broasca = pozitiav + 70;
  
  if (
    ( stanga_minim_b > stanga_minim_broasca && stanga_minim_b < stanga_maxim_broasca ) || 
    ( stanga_maxim_b > stanga_minim_broasca && stanga_maxim_b < stanga_maxim_broasca )
  ) {
    coliziune_pe_orizontala = true;
  }
  
  if(
    ( top_minim_b > top_minim_broasca && top_minim_b < top_maxim_broasca ) || 
    ( top_maxim_b > top_minim_broasca && top_maxim_b < top_maxim_broasca)
  ) {
     coliziune_pe_verticala = true;
  }
  
  if(coliziune_pe_orizontala === true && coliziune_pe_verticala === true) {
    var reiajocul = confirm("Te-ai busit. Vrei sa reiei jocul ?");
    if(reiajocul == true) {
      coliziune_pe_orizontala = false;
      coliziune_pe_verticala = false;
      pozitiah = 0;
      pozitiav = 50;   
      broasca.setAttribute("style", "left: " + pozitiah + "px; " + "top: " + pozitiav + "px;");
    
    }
  }
  
}
!
999px

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