Ground Hog Day Level 1-30 is solved in two steps. Build a solid three box cart with the metal frames, power wheels and the umbrella in the back. Navigate your contraption to the first crevasse where you should slow down a little by opening the umbrella. Your vehicle should fall through the star box and down to the finish line. In our second contraption we replaced 2 metal frames with wood frames and removed the umbrella. Navigate your contraption as fast as possible over the first crevasse, all the way to the far right ramp and turn off your motor just before the fall. Your contraption should easily roll backwards across the finish line within the time limit.
If you have a different strategy for completing this level feel free to leave a comment below.