The number workshop rebuilt on quantum rules — digits arrive as qubits held in superposition, entangled pairs move together, and a measurement collapses them into the value you have to work with. A shelf of 150 ready-made modes runs from a single qubit through trios, quintets and sextets to twin targets, entangled arsenals, Collapse Casino, Quantum Roulette and Full Quantum, with difficulty from gentle to brutal.
Every puzzle is guaranteed solvable, there is a daily puzzle shared by everyone, and a streak counter and solve log track how you are doing. Five languages, and games save and load from file.