RotaBall Puzzle

RotaBall is a marble-sorting puzzle. Coloured balls roll along a rail, drop into rotatable four-cup rings, and travel through pipes. Fill a ring with four of the same colour and it explodes. Clear every required ring to finish the level. Later boards add colour gates, dye pots, one-way arrows, flip-flops, shared cups, padlocks, brass hourglasses, and lights that demand a colour order. A teal siding is a holding bay. The patience bar under the rail is a life if you leave a ball waiting too long. One hundred hand-built circuits. Each clear awards a five-letter password. No accounts. No ads in the puzzle itself.