Nonogram
Fill the grid to match the numbers on each row and column: tap to fill, again for a cross, again to clear, or drag to paint a line; solve it and a coloured picture appears. Six 5×5 and six 10×10 puzzles.
Built with
How it was made
Written with Claude Code as a single web page with no libraries; a solver checked that each of the twelve pictures has exactly one solution and can be reached by line-by-line logic alone, with no guessing.