Bad Piggies Tusk ‘Til Dawn Bonus Level 5-VI (5-6) can be 3-starred using two similar contraptions. Beating the clock should use the boxing glove to immediately move to the upper path, while the star box involves a bit of cunning.
If you have a different strategy for completing this level feel free to leave a comment below.
You can also do the star without the punching box. Just accelerate through the dip and power off the suction cups at the top, you’ll flip back, grab the star and re-enter the dip, then just drive up the side and continue on. This video’s much more nifty, though.