Letters Memory Challenge is fun html5 game for kids and adults that you can play online for free. The aim of the game is to find all matching images to win the game. Choose level mode to play and have fun. memory game, matching game, HTML5 game, online game, kids game, adults game, brain training, cognitive skills, concentration, problem solving, free game, mobile game, school games, old school games, thinking game, puzzle game, memory challenge, matching images, arcade game