Algodoo

This scene is designed for testing builds that are able to resist extremely high loads.
The box will grow in density (seconds passed^3) and if it falls below the line, you fail the test. There is no win condition.
It's recommended to have a powerful computer. You can run this with any computer that supports this simple scene, but the main reason why it needs such a beefy computer is to compute the extremely high weights your build will endure.
The recommended frequency for this scene is 12000 hz. Minimum for percision is 4200 hz, and absolute minimum is 120.
You can upload response scenes to this to show your builds that can withstand more than others. Fixjoints, axles, gluing that ultimately results in it being locked to the scene (glued to the background) will not be counted.