labyrinthine puzzle: a challenging and intricate maze

esoteric labyrinth multifarious labyrinthian amusement confusing challenging difficult intricacy headache game unsolvable mazelike mysterious obfuscated mystic hard thorny complex fun meandering daedal intricate twisty adventure unintelligible winding knotty perplexing brain teaser puzzle serpentine problematic challenge unfathomable complicated puzzlement devious muddled puzzling