Not a bad game, great graphics and tight controls. There have been several versions of this exact game and story told before but this one has a high level of polish.
Fun little game and cool concept, would love to see this expanded upon. Also you should make the collision groups smaller for the ghost hunter. I found that I was often dying because my character was having a hard time fitting down the allie ways.
Glad you enjoyed it and thanks for the feedback - i've scaled the collisions on the player down a bit as you suggested.