puzzle-solving line icons collection. riddle, clue, enigma, conundrum, brain-teaser, sudoku, crossword and linear

vector icon line sign riddle clue enigma conundrum brainteaser sudoku crossword cryptogram maze jigsaw logic puzzlepiece pieces solution strategy quest challenge adventure mystery detective perception insight deduction reasoning analysis investigation mindbending tricky smart intelligent creative innovative complicated complex multidimensional multilayered twist esoteric curiosity intrigue gratifying satisfying exhilarating arduous fulfillment