Yeah, I didn't use it because liquefy function is very unstable.
In your scene, it seems to crash or produce an odd quantity of juice when you use it with an irregular shape.
It's quite efficient on regular shapes, though.
Very nice idea but it's too difficult IMHO.
It would be better with a longer needle.
EDIT : Oh, I just understood that the needle tells the gravity direction. I thought it was ~random and that you had to push incoming balls with your needle
Now that I understand the real game, I find it less fun than what I found before I understood. Not a bad idea, though.