I really like the play on the theme, both in terms of mechanics and the story. I got to like 90 seconds but after that it does get a bit difficult :D If you plan to work on this after the jam, maybe you could introduce some power ups, that could randomly appear after piggies destroy a block, and player can pick them up with RMB. In line with the tale, it could for example be like wolf blowing, which would keep piggies away for some time and let you regenerate blocks, or he could even eat them to decrease number of piggies. All in all, it's a great jam game with interesting theme, that can be expanded further. Good job!