@3run:
I reduced the rubber effect a little. I've set the iteration count to 30 instead of 8. The effect is there because the objects have to collide with each other and the calculations of forces and counteracting forces lead to this bouncing rubber effect.

@xxxxxxx:
The floor is static. It has no elasticity or other physic properties.

@all:
I've fixed the bug with double-selecting one brick or plank for gluing them.
Next thing will be more savegames and maybe other levels (with fixed walls).
Also i've got a height calculation. So i can also do challenges or achievments

Greetz Felix