Sikku: One Line

Draw one unbroken line from 1 to the last number. Reach the numbers in order. Fill every open cell. Three rules. That's the whole game. 150 puzzles across six chapters, every one hand-picked rather than generated on the spot. The ramp is deliberate: First Light teaches the line on small boards, and by Singular you are on a seven-by-seven full of walls where exactly one route works and you have to convince yourself it does. • 150 puzzles — the first 50 free • Six chapters, each in its own colours • A best time and a flawless badge for every level • A hint when you are stuck. It costs the badge, nothing else • Progress follows you across devices through iCloud • Plays entirely offline • No ads, no tracking, no account, no subscription Chapters three to six open with a single one-time purchase. The sound is synthesised rather than sampled: one note per cell climbing a pentatonic scale, so a long clean run sounds like a phrase instead of a click track. Turn it off if you would rather think in silence.