Users can now pay to rebuild the cube in Curiosity.
Launched in November 2012, the debut game from Peter Molyneux's 22 Cans tasks players with tapping away at a single cube to remove cubelets. The cube is eventually set to break open, revealing something "truly amazing" and "absolutely unique", according to the designer, but only the player who delivers the decisive tap will get to see what.
The cube initially consisted of 69 billion cubelets. Now, with a little over 50 layers and 3.6 billion cubelets remaining, a new update for the iOS and Android app lets users pay to automatically remove or add cubelets at the start of the next layer.
According to Pocket Gamer, users can pay 69p / 99c to remove or add 10,000 tiny boxes, £4.99 / $6.99 to ditch or add 100,000, and £7.49 / $10.99 to take away or add half a million.
22 Cans said: "We don't know quite what will happen in this war of attrition. Curiosity may very well rapidly degrade to reveal its innermost secret or maybe the effects of automatically removing cubelets will be neutralised by players keen to keep Curiosity going."
So far, 13 million cubelets are set to be removed automatically from the next layer of the cube, although four million will be added straight back on.