First of all, if you have already reached level 30 after about 60 days there's something wrong haha, I still do the last routines often from the program now after 2,5 years!
Second of all, if you are at level 30 you have become a really experienced athlete. You could call yourself a calisthenics enthusiast at this point. You'd be able to make your own routines and put workouts together yourself. You'd have all the knowledge for that and be really experienced after most likely, years or at least many months of training.
BUT - i'm currently working on an expansion for the workout program - Level 31-40. Really advanced exercises with elements from weighted calisthenics also. (Free for premium members)
So don't worry - you will never be stuck or not have any exercises to do. In reality you could do the last 5 levels of the program for a loooong time. It takes long time to increase in strength :)