Piggy Pile Up

Puzzle casual game, players by placing the system given a variety of shapes of blocks, including square, rectangular, triangular, round and other four shapes, to build a stable structure, placed 5 seconds to pass. There are currently 40 levels in the game, with increasing difficulty. The next level can be unlocked by completing the building blocks in the current level. Note that the blocks will be affected by gravity, mass, friction. They are the best choice for leisure and entertainment and brain inspiration. How many levels can you play?