Very basic against-the-clock ball-shooting game. You fire the balls into the nine slots in the atomic nucleus, but the twist is that you have to remember to hit the "Stop" switch to claim your score - if you sit back after landing all the balls, the timer runs out and springs a trapdoor, causing all your scoring balls to fall through the floor and leave you with nothing.
 

ORIGIN: UK

VARIANTS: Election (US)

Since the US game bears no connection with any sort of electoral process, we can only assume it was supposed to be called the much more logical "Electron", but an unfortunate typo went unnoticed until it was too late.