Algodoo

Looks alright, but suspension definitely needs some work

Spring constant refers to the amount of force a spring can excert. Damping is the "stiffness" of the spring. Target length is, well, the desired length of the spring. Try playing around with these sliders to get the desired suspension attributes. Don't make the spring too bouncy, but not too stiff either.

For the map, select an object, hold shift, and scroll the middle mouse to "layer" the objects visually. It makes the scene look more appealing.

Other than that, the rest seems sufficient enough. I'll return if I find more flaws in your scenes.