Hi,
No, I did not take your idea.
Your idea seems to be an editor where a user gets to create boxes and other objects then plays with them in a world. My game is merely a vehicle demonstration, where a user gets to drive around in a landscape filled with other objects.
The name of our two games is the same, however. I just didn't want to call my game "Driving Simulation" because it is not a very good driving simulation. I thought that "Physics Playground" was more appropiate because the only great thing about this game is the physics.
I'm sure that your program, when released, would receive far more interest than this one.
good luck
www.fishbrosentertainment.com