You have to co-operate to complete the puzzle as a team, but you have a time limit, so don't just sit around staring at the pieces. In addition to the time pressure, players have other challenges, such as not being able to talk or to touch certain color blocks.
Mental Blocks features sixty puzzles: thirty "family mode" puzzles and thirty "challenge mode" puzzles that ramp in difficulty. For an even wilder game, you can add a traitor to the table to block your block-building...
