I love the textures and 'faded' color of this shot for it makes me think it might be a vision of memory - hazy in recall. Or even an old shot that has worn and faded over time. I can barely see the 'ghosts'. Given the theme was spooky or Halloween I think that this composition would benefit greatly if you made the spectors more visible but bumping up the opacity on the ghost layer just a bit more - just enough so they are seen better but not so much that they lose the 'see through' quality.