Polarity

Polarity gives you exactly one control, and it changes the whole board at once. A steel ball rolls down a narrow track scattered with fixed magnets, and every tap flips all of them together between attraction and repulsion. You never steer the ball directly. You choose when the field changes and let it bend the ball's path for you. Gates sit across the track between two amber posts, and threading one builds a combo that multiplies each gate's ten points, up to eight times. Red spikes end the run on contact, and the camera never stops scrolling down, so a ball caught hovering near a magnet soon gets pushed off the top of the screen. Things get harder a few sections in: magenta magnets that always do the opposite of the cyan ones, stronger double-ringed cores, narrower gates and a faster scroll. A faint dotted line traces where the ball would go if you flipped right now. That makes each tap a small prediction you can check before you commit. Flips have a short cooldown and are held until it ends, so good timing beats tapping faster. Because the board comes entirely from a seed, a challenge link puts a friend on exactly the same course.