The "RED ZONE Update" adds a second difficulty, as well as adding some minor system changes (Toss a Bunny into a Jenny. You're way too welcome.) and once again adding more colors to Pecan's closet (It's actually Flan's, but....) as well.
Also planning on extending the backstory a bit, later. Again, stick around for details soon.
And don't forget, the soundtrack is out. Listen to it and even download it at a price for four bucks!