Warning Light
At the top of the Marble Tower there is a warning light, which will warn you when you have too many marbles in the puzzle at the same time. When too many marbles have been dropped into the puzzle at once, the light will flash red and a warning sound will be heard. At that point you should wait until the marbles finish getting through the puzzle before proceeding. If you choose not to heed the warning, all the marbles will be destroyed and the game will need to be restarted.