Ball Grinding Method

The ball grinding method refers to when you stack up on tons of balls, via the Random Rooms Glitch.
 * Suppose you get a Break Point (or some other High Net Gain stage with more crystals than obstacles), finish the current stage and then enter the next stage.
 * Keep quitting, closing the game, restarting the game and then briefly pressing Resume (otherwise you will return to the Main Menu), then wait for another stage with many crystals.
 * Keep doing this, taking advantage of any High Net Gain stages, then you will eventually have thousands of balls.

Or, you can just cause a Repeating Checkpoint Glitch, and then smash the crystals, obstacles, etc. If your stage is classified as High Net Gain, then you will get more and more balls. (see the video)

Don't waste the balls!