At the start I didn't realize the rod connecting the balls could actually pass over obstacles. Maybe that could be made clearer somehow?
About the rod you're totally right I made a mistake. I think in level 2, when you are suppose to use this behaviour to beat the level, I should have put a wall at the start between the balls. So because the blue ball automatically gravitate, you will automatically figure out the rope can touch a wall (like below). Thx for your return !
