Nintendo tumbler puzzle Nintendo tumbler puzzle The Nintendo tumbler puzzle, also known as the "Ten Billion Barrel" in English and originally in Japanese, is a mathematical puzzle in the style of Rubik's Cube. It was invented by Gunpei Yokoi of Nintendo in 1980 and was covered by (until the patent expired in March 1995 due to non-payment of a maintenance fee). It consists of a "cylinder" of transparent plastic divided into six levels, together with a black plastic "frame". The frame consists of upper and lower discs that are joined together through the middle of the cylinder. The top and bottom levels of
Agent A: A Puzzle in Disguise Agent A: A Puzzle in Disguise Agent A: A Puzzle In Disguise is a suave secret agent adventure game developed and published by Yak & Co. Your mission is to infiltrate enemy spy Ruby La Rouge’s secret hideaway and put a stop to her evil plans. Chapters 1-4 are currently available on iOS and Android with the complete tale of espionage (including the fifth and final chapter) announced for release early 2019 on Steam, Nintendo Switch, PlayStation 4, Xbox One and Mac App Store. iOS and Android will also receive chapter 5 'The Final Blow' at the same time. The