Level 1-2 is the second level of Ground Hog Day
Solutions
In this level you have a object that when clicked will make you go the opposite direction the tip is pointing, you can put this on the right side to get the star box then hit the TnT in order to get the checkpoint. If you want to get the 4 second star, you must build a contraption with 2 wheels 2 boxes and the pusher to the left and press the pusher as fast as possible.
Stars
You can get 1 star by getting the pig to the checkpoint
You can get another star by collecting the star box
You can get the last star by completing this in 4 seconds