You're correct! You've chosen left which is correct. Maybe the sign is a messenger. Could it be someone who went to this labyrinth? i think the messenger is trying to warn people to not come to this labyrinth. Well, I don't know. Good job though! Wait what's that! There's another sign what could this be?
<p></p><a href="http://rainbowchrome.neocities.org/Labyrinth5.html"/><img src="http://images.vectorhq.com/images/premium/thumbs/166/nerd-geek-thinking_166961168.jpg" width="500" /a>