This is a realistic physics sandbox game. The game is mainly focused on ships on water; however, you can build various objects using different available materials. When you have finished building an object you can do whatever you want with it.
For example, you can fire a bomb at it, cut holes, sliceit, heat it up and see if it can melt, you can even set it on fire. The most fascinating thing is that you can observe how you destroy your own creation and how it goes underwater. Enjoy playing!