After completing Big Dig last year, we came back for another Co-Operatives game! The staff member recommended this one to us and we commented that it was rated challenging, and he said that all the games are designed to be the same difficulty, and the challenge ratings are based on player feedback and how well they do in the games. That definitely rang true to me, as we didn't find Elixir Mixer to be more challenging than Big Dig. Great puzzles and fun theme! I do wish the ending potion had more of a "big reveal" to mark completion. The potion was just a bottle full of glitter and didn't look any more exciting than the ingredients we'd been collecting. But besides that, it was another great Co-Operatives game with fun puzzles and kind staff. We look forward to returning a third time!