There are no "physics" in this game. The strongest engineering structure is the triangle. In this game, the triangle has little, if any, structural integrity.
Rather then working with actual, known physical principals, the player must spend his/her time trying to figure out the games "physics", which change with each level and, sometimes, within the level you are playing.
I gave a second star to account for the small entertainment factor.
Kscherer MacLife about SimplePhysics