You can't actually hack your Level with this guide
But you can prank your friend or preview a level you need.

Open your profile in your web browser.

Open console in your browser : Chrome - Ctrl + Shift + J, Firefox - Ctrl + Shift + K

Insert this code :

var setLevel = -1; //change value to needed level (disabling increasing) var threads = 50; //(higher number - faster increasing, min. 1, max. 1000) var level = parseInt(document.getElementsByClassName("friendPlayerLevelNum")[0].innerText); var counter = setInterval(function(){ document.getElementsByClassName("friendPlayerLevelNum")[0].innerText = level; document.getElementsByClassName("friendPlayerLevel")[0].classList.value = "friendPlayerLevel" + " " + LevelClass(level); level++; if (setLevel>0) { document.getElementsByClassName("friendPlayerLevelNum")[0].innerText = setLevel; document.getElementsByClassName("friendPlayerLevel")[0].classList.value = "friendPlayerLevel" + " " + LevelClass(setLevel); clearInterval(counter); }; },1000/threads); function LevelClass(lvl) { if(lvl>=5000) return "lvl_5000"; if(lvl<100) return "lvl_"+parseInt(lvl/10)*10; if(lvl>=100) return "lvl_"+parseInt(lvl/100)*100+" lvl_plus_"+parseInt(parseInt(lvl%100)/10)*10; }

Edit a code for your needs:

• Change value of setLevel from -1 to any level you need. If setLevel is more than 0, the script disables the fancy animation.
  
• Change value of threads to any value from 1 to 1000. More threads will increase speed of animation.

Press Enter.