If you’ve got a Halloween hangover, “Ghosthunter” might just be the hair of the dog that bit you. Or, it might not. It’s going to be one or the other. Not quite terrifying and not quite a Saturday morning cartoon, its lush visuals, unparallelled atmospheres, precise controls and buckets of charm all work against recurring clunky design moments that have you floating aimlessly in the next dimension, or pacing in circles.