Needs random tests.

Kata is stuck in Node 8.

What's the reason behind differentiating the data type of each argument?

Invalid test cases:

//Test case 2
//Elevator on 1st, someone in it, no move
Test.assertEquals(1+goto(1,'C3',true),1);

Should be:

//Test case 2
//Elevator on 1st, someone in it, no move
Test.assertEquals(goto(1,'C3',false),0);

levels can be only numbers: 0,1,2,3 buttons can be strings: '0','1','2','3'

You should add this tests:
goto('2','3') -> 0
goto(2,3) -> 0
goto('2',3) -> 0

And negative numbers tests, both for levels and buttons.

Thanks.