The camera does follow the Blue character, but you're right that it doesn't show the whole level. This was partly to control when the dialogue from Green and Blue could be seen, but also to 'join them together' in another way – if there's only one camera, they need to be somewhat close for you to see what both of them are doing. But I'm not sure this was as successful as I hoped!
I'm glad you enjoyed it though, and thank you for the feedback :)