Я не Kilinich, но отвечу. Чуть-чуть поэкспериментировав, я пришёл к выводу, что это скорее баг Algodoo, чем твоя оплошность. Если прямоугольники ограничивающие поршень прикрепить (крестом), а не приклеить, то всё будет работать.
Some parts are too colorful, but it is like "phun" style
Besides this, big lift isn't working (on Algodoo) and you didn't mentioned that I should press "c" key to close doors of the rocket, so it is 9/10.
It is strange. Usually it acts right, or sometimes I have to do two or three "Q"-s. I had better version with the device which prevent him from doing damage to himself, but it was long time ago and think that neural robots isn't interesting to community.
It is because people with versions lower than betha can't see 1.7.4 scenes (betha isn't released for Mac and Lin).
And, I don't know how to downgrade, sorry You can try to copy scene from 1.7.4 and past it to 1.7.1, or remade phun version.