Slider freeze technique is required. Spoiler: Video Solution This is the way I intended, but if it's different that's ok. as long as it doesn't lead to shortcuts.
@alarcon I'm also not sure what tricks can be used, but i'm sure that autopilot can. You should think more logically instead thinking to use the common tricks.
Very enjoyable short level. Nice contrast of gentle and forceful squeezing. My gameplay same as video . Loved the path of the ball nearest to B.
I now try to play your full design way, but there is shortcut win Spoiler I rise silder, repeat fast tap metal block and stone block below stairs. Bot fall and win I finished level. Some part have little problem, bot easy to fall to ground, also many times trapped on top rounded stone. Very clever plan of balls and path!