Nonocat

Classic nonograms: a picture emerges from the numbers along the edges of the grid. The numbers left of a row and above a column give the lengths of the unbroken groups of filled cells there. Matching rows against columns, you rebuild the drawing step by step. You never have to guess: the solution is unique and follows from logic alone. 154 pictures, every one drawn rather than assembled from noise, sorted into six themes so you pick an activity instead of a difficulty multiplier: icons for a five-minute break, nature, machines and things, myths, fairy tales, and landmarks on grids up to 60×60. Every tile says how big its grid is, so you know upfront whether this is ten minutes or a whole evening. Two fingers move and zoom a big grid, and one button fits the whole picture on screen. You can leave a picture half-done and come back later. In races you solve three grids in a row — 5×5, 5×10, 10×10 — against a recording of another player. Wins and losses go to a shared table.