What it looks like

One button, and a machine turning quietly behind it so you can see what the game is before you start it.

A crank, a gap and a machine. Fill the gap with gears until the movement arrives — no arrow, no pace, no reading.

The machine now says which way it must turn. One more gear in the chain flips it, and the child finds parity by building it.

A pace mark appears: half, double, three times. Gear sizes are no longer interchangeable — the ratio has to be built.

Stars go to the machine with the fewest gears, so “it worked” and “it worked well” stay different things.

Levels sit along a path through the three worlds, each showing the stars it earned.

Music and sound effects have separate volumes, the language changes instantly, and unlocking sits behind a parental gate.