Bad Piggies Rise and Swine Level 2-33 can be 3-starred using two contraptions. Grabbing the star box is hard, but place a downward-facing boxing glove under the contraption and try jumping your way over the wall on the right. It’s not easy, but it can work after some practice. Beating the clock is significantly easier, by just lining up the piggy in front of the boxing glove and letting loose!
If you have a different strategy for completing this level feel free to leave a comment below.