As a civil engineer who works in construction I absolutely love this game. Every day I go into work and check if the construction site is safe or not. What is funny is that this isnt too far off from what you learn in class at University (such as in statics). There are so many more ways you can make this more dynamic. One off the top of my mind is that the game tested the structures vertical load but not its horizontal load. Plus the forces applied to the structure are point loads, but you can also add distributed loads (for example, if you drop gallons of water over the structure evenly). If you plan to make this a commercial release (or even just developing the game further after the jam) I would love to help out using my academic and career knowledge :)