Move the cursor to the corner(s) the arrow(s) is(are) pointing to. As you do so, this will drag the entire arrow into view and display a 2 digit number at the end of the arrow. Enter the numbers according to the color scheme.
The answer to level 39 on the Never-ending game is pennywise
BAM
random
the answer is, larve
pants
tetris
the answer is pie
week
pants
73786976294838206464
scream
The answer is 1967