So many tricks have been combined in a compact space. Great quadruple use of the sliding block there, and creative usage of the slider for stepping down.
What am I missing? I can't get B to climb onto the rotational device to get up on the wall to push the last pearl. As for the six first pearls I agree with @richardfu
It does take some trial and error for that last pearl. For me it seems B would more likely climb onto the rotor if you rotate it and immediately tap on the rotor's front-facing surface.
: Amazing. Most of those hidden tricks are together in 1 small puzzle. Well done. I have a cooler name suggestion for this puzzle. Just call it Dragon Ball. @FabianS The ground area of the last ball can be reached by another method. Drop down to pipe where the movable block located and squash it into wall.
@richardfu Thanks. My aim was to pack as much functionality into one mechanism as I could and to build a level around that. I have since realized that I could have designed this even better, so there will be a sequel (maybe an 8 or 9 pearl one). The step down slider trick is the most compact one-way drop down method I've run across.
@cpw If you can get the Bot up to the last pearl platform with just the motor let me know, as that's a bug that wasn't intended. The bot can occasionally get stuck moving the 5th pearl, but I couldn't find a way to fix that.
@retrograde I did manage to get B up there with just the motor. Sometimes the bot (while rushing towards the motor) would step onto its vertical surface and would stick onto it while it is rotating upwards. And I actually thought that was the intended way to do it......
I've released "Nine Pearls" which is based on Seven Pearls, but adds even more craziness. http://mekoramaforum.com/media/nine-pearls.2039/
I've released an even harder variant than both Seven and Nine Pearls called "Eleven Pearls". http://mekoramaforum.com/media/eleven-pearls-v4.2580/