ild(wolfElement);
          wolves.push({
            element: wolfElement,
            x: w.x,
            y: w.y,
            vx: 0,
            vy: 0,
          });
        });

        // Create pen - only needs to be created once, but repositioned
        let pen = document.querySelector(".pen");
        if (!pen) {
          pen = document.createElement("div");
          pen.className = "pen";
          gameContainer.appendChild(pen);
        }
        pen.style.left = levelConfig.penX + "px";
       