Silvia
One Stroke (一笔画)
The beloved single-line tracing puzzle. Draw one continuous stroke that covers **every line** of the figure exactly once — never lifting your finger and never going over a line twice (an Eulerian trail). Begin on a glowing dot and drag along the lines; the stroke paints in as you go. Figures grow from a few lines to tangled lattices.
Odd One
Mobile-first visual scan template: find the only tile that differs by colour, shape, or rotation before the timer runs out.
Notakto
Tic-tac-toe turned inside out — the **impartial, misère** variant (Thane Plambeck & Greg Whitehead's "neutral tic-tac-toe"). It is **net-new** and the only game of its kind in the set: a combinatorial game where both players use the *same* mark and making three-in-a-row is something you want to *avoid*.