As for me, I had one idea what could be done to make the game work better, when I was drawing my picture, and it seemed good to me. Unfortunately, I forgot it.
I think it was something like that everybody could draw two pictures to maintain some continuity (the pictures will be then distributed randomly, could be following each other, but normally they should not), or be given a random picture to see for inspiration or something. I don't know. If I remember the exact idea of what I had in mind, I will post it here.