Trying different colours for the evil ghosts. I originally wanted to go for a shade of purple as I'm using shades of purple, pink and some blues in the environments. But I decided that this would mean that the ghosts wouldn't really stand out against the background. I'm choosing green because I think it is a good contrast to all the purple in the environment and it's a sort of slimy ghost type colour and I also think it helps to identify them as enemies.