Japanese crosswords or Nonograms are very popular in gaming spaces. Nonogram is a classic game that challenges you to solve logic puzzles, resulting in colorful pixelated images. Hidden on the crossword grid. Fill in the cells with blue squares using the number clues on the left and above. Between each set of filled cells there must be at least one free cell in the Nonogram. Gradually the task becomes more difficult, the crossword puzzle grid expands.