My cube rotated and I was like "that's a nice idea" then it kind of fell forward and stopped rotating. During 2 player mode I had one player stand on the left corner and just let the ball keep going between the right wall and the bottom one. Free points!
I think you shouldn't have the "paddles" move without rotating and lock one of their axis so they won't rotate forward (and get stuck). Having them slide while rotating looks weird.