Algodoo

firstly, you only use Ctrl+C and Ctrl+V: need change script: pos := e.pos and etc...

and timeToLive.... and clear not so needs info

...and don't use killer plank

You need to add the position for the circles that are spawned. like pos := e.pos otherwise they spawn somewhere.

And you dont need to add every property. Things like density, radius, position color etc. are enough the code for spawning an circle to push a rod back can be ten rows long and not 100.