While the game is really original and really fits the theme, I'll lower my rating on the design aspect for a few reasons.
The ghosts are supposed to be your main concern, since it's supposed to distract yourself from the spike and having to juggle between the two obstacles. However, since the ghosts are slow, they are not a real threat : even then, simply walking holding the torch perfectly protects you from ghosts, as the hallways are almost always big enough for you to pass through and the fact that ghosts cannot approach you while holding the torch. The game is then about seeking your path through the darkness and avoiding spikes.
The concept is really good, but the ghost mechanic should be remade differently to better fit your really good ideas! Good game overall, but I'd like to see it in a different approach.