I take a time (im very noob) to solve this problem and this teach me to dont overthink the problem.
In first time i was trying to find some alert on the source code.
After this i begin to take a look on that js links on the source code and the last link in the last function i find a hint: a timer.
And finaly i find this: if(p==d){window.location=“?pass=”+p;}else{window.location=“/levels/”;
So i begin to try call the function() on the console, but was not possible end i just tipe “d” and the pass was there just for me :D