Spoiler: Trick List - low ceiling (B acts strangely with a low ceiling and may travel over stairs that B can't normally do) - cancel tap (tap some place on the level where B can't go to stop the move) - elevated eye (an elevated eye will change the properties of the block above to not passable) - auto pilot (tap and move slider to redirect B) - quick slid (with R on B, a quick slid will drop R) Spoiler: Video Solution
You have gone to the dark side! I was sure my move to get B off the draggable when he looks stuck would be a shortcut . But no, its in the designed gameplay. Close combat in this level with rubbing shoulders , tilting Ps and claustrophobia to contend with but it was a focused fun challenge. My win was very similar apart from the start when I simply rested R on a draggable.