Really creative take on the theme! Turning people into stone by looking at them is a fun idea, and different from all the ghost games (including mine haha).
I wasn't sure where to go though, I only found out by accident that the level continues to the right. A small arrow or sign pointing to the exit would help a lot. I also never found my shades, picking them up at the end would be a nice way to finish the story. And even without sound effects, some simple background music would add a lot!
Cool idea, keep it up!