Pretty good game most levels were pretty easy to figure out. @alphahorm the last level I made it on the first try.
First I placed a spring on the top level and then one at the bottom in between the bottom openings. Then I hit resurrect when they hit the bottom spring it causes them to bounce back up to the level that they were on wait as they go back and forth and eventually they will both become in sync with each other to where they will both drop to the lower level at the same time. That is when you need to be ready with the girder to place it down so that it blocks both holes so they can't bounce back up they will bounce for a bit and one will go to the house the other one will go to the other wall and then come back and bounce and then head to the house as well.