This is a "magic 8-ball" style novelty, not a competitive game: ask any yes-or-no question, shake the ball, and it gives a plain 50/50 answer drawn fresh each time — there's no hidden logic reading your question, the crystal ball is a literal coin flip with theatrical presentation.
A running tally of "yes" and "no" answers is kept for the session, so you can see how the streak of shakes has actually landed rather than just the most recent result.
The glow, burst and sound effects around each answer are purely presentational — every shake is an independent 50/50 draw, so no amount of ritual or technique changes the odds.