Setting up event listeners

game.js

    // Setup event listeners
    function setupEvents() {

      document.addEventListener('keyup', function(event){
        var keyName = event.key;

        switch(keyName) {
          case "ArrowRight":
              interactions.right = false;
              break;
          case "ArrowLeft":
              interactions.left = false;
              break;
          case "ArrowUp":
              interactions.up = false;
              break;
          case "ArrowDown":
              interactions.down = false;
              break;
          default:
              break;
        }
      });

      document.addEventListener('keydown', function(event){
        var keyName = event.key;

        switch(keyName) {
          case "ArrowRight":
              interactions.right = true;
              break;
          case "ArrowLeft":
              interactions.left = true;
              break;
          case "ArrowUp":
              interactions.up = true;
              break;
          case "ArrowDown":
              interactions.down = true;
              break;
          default:
              break;
        }
      });
    }