I followed the arrows too. Took me 15 mins or so to solve. I think the former comment meant that he thought that once you are on a node that is in front of an a

I followed the arrows too. Took me 15 mins or so to solve. I think the former comment meant that he thought that once you are on a node that is in front of an arrow, you have to follow that arrow, but that is not its meaning obviously.