Took me bloody ages to figure out that fucking square room, tell you what.
It was a clever mechanic, using friction, but honestly since absolutely everything you're taught up until then tells you that the two balls will always travel at the same speed, it was a little confusing. I'd recommend at least a hint in that level.
"Sometimes letting go can get you farther than holding on"
Though that might be too obtuse.
All the same, nice little game and a nice contribution to the Jam, dude. My score might be inflated, but who's going to argue reviewing harshly here of all places?