Rearrange letter tiles to answer twenty short clues.

Link two words by changing one letter at each step.

Set binary inputs to match six logic-gate targets.

Play a compact game of Go against the CPU.

Build an unbroken hexagonal chain against the CPU.

Race a CPU pawn across a board of changing walls.

Clear twenty dot-filled mazes while avoiding ghosts.

Collect gems under falling rocks in twenty caves.

Switch tracks to deliver twenty scheduled train groups.

Trigger expanding circles to catch a moving cluster.

Draw safe routes from aircraft to matching runways.

Intercept incoming missiles with expanding defensive blasts.