The La Bidouillerie demo is out. You can download it from this page, free.
A perforated chassis, a crate of parts, and a robot that has to roll. The mechanics bolt underneath, the wiring goes on top. You switch the power on, and that is when you find out what you missed.
Nothing is faked. The current is genuinely computed, ten thousand times a second. Your machine stalls at dead centre until you fit a flywheel. Your breaker contacts erode, spark after spark, until they no longer conduct — and a capacitor in the right place saves them.
Every fault has a cause, and you can find it. F1 opens the Encyclopaedia: every part, every idea, every failure, all cross-referenced. It is not a manual, it is a workshop notebook.
Eleven build missions, from a solenoid you slide by hand to a robot that crosses a track on its own battery. Then a sandbox, crate open, where nobody tells you what to build any more.
If you tried it last night and no current would flow, that was a fault on our side, fixed in 1.5.2.