固有振動
Daily Picross contains up to five challenges, all on a 7×7 board with Normal mode rules. Mistakes in this mode incur a five-second penalty. Once a challenge is completed, the game time is recorded, graphed and assigned a letter grade, with A being an average time under 30 seconds. When other modes are unlocked, the grades are averaged together to obtain an overall grade, with five A grades resulting in the highest overall grade of S.