This game I really enjoyed, I felt it needed to explain about the robot though. Since the ghosts who were scared of light got a tutorial type thing while the robot just kinda appeared.
One comment says that there should be a tracker for the 10 seconds of light but I know in a way there is one, on the first level I sat at the portal with my light on and noticed the candle slowly going down. Working like a real candle would.
It was a little on the short side but I guess more levels will be added, the story seemed to need a little more buildup, maybe a small cutscene or flash before each level or something. Also maybe a way to click through text on the ending, since I had to sit and wait for quiet a while for it to change. I still rate it 5 though :)