QX-16 is a complete quantum computer you can use and look inside. Every program runs as machine code. Every random bit comes from measuring a qubit.
To start: wait for the QOS shell on the screen, pick Q-LAB with the arrows and press Enter. Or type a command at the QOS> prompt, such as HELPpick Q-LAB with the pad's arrows and tap START. Q-LAB runs the classic quantum experiments on the machine.
Play: every key goes to QX-16, as if you typed on its keyboard. Explore: keys fly the camera and open the tools. Press Tab to switch, or click the screen to play. The badge at the top always shows the mode.
The program is real. Every step of the OS and its apps runs as QX-16 machine code on the simulated control processor. JavaScript only decodes the screen memory and forwards your keys, like the encoder chip in a keyboard.
The quantum effects are exact. The QPU keeps all 2^n complex amplitudes and changes them only with H, T and CNOT, one primitive at a time. Every composite gate runs as that microcode. If you turn on noise, the environment model also adds random Pauli errors. Every random outcome comes from a measurement (the Born rule): a pseudo-random generator, seeded from your browser's entropy source, draws each result with the exact Born probability. Real qubits would give true quantum randomness.
The qubits are simulated. The memory for the state doubles with every qubit: 16 qubits need 1 MiB, 30 need 16 GiB, 40 need 16 TiB, and near 50 qubits (16 PiB) no computer on Earth can hold it. Beyond that point, you need real quantum hardware.
Some views peek. Panels marked SIMULATOR VIEW read probabilities and Bloch vectors that a real machine can never read. Real hardware can only measure.
It is checked while it runs. A second interpreter, written from the spec alone, re-runs sampled instructions of the live machine and compares every result. The audit badge counts the checks and turns red on any mismatch.
You can break it. The Fault Lab injects a hardware defect, such as a T gate that turns by the wrong angle. The programs then fail the way real hardware fails, which shows they really run on it.
The tour proves it. Each Genesis chapter runs its widget and its proof on the real engine: its own qubits or its own sandbox machine, never the one you are using.
In Play every key goes to QX-16: the page is only its keyboard's encoder chip. In Explore no key reaches the machine.