The challenge depends on the certain social setting. The style of communication would be our key challenge depending on how we decide to implement the puzzle. This is because the puzzle is done silently so people will either have to find a way to signal other players to build and communicate, or people will have the option to communicate with words. The type of text communication would also be a challenge because we need to figure out if people should communicate with pre existing word choices, or we should give the user full freedom to type whatever they want into a chat area. The way a person would signal to another user that their pixel is correct would also need to be figured out.

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Other challenges we will have to address include the amount of time for this game, which would fluctuate depending on the social setting given. For example, a movie theater might only have a few minutes of downtime before waiting for the movie to start, while a bus and airplane time varies depending on the destination. Furthermore, time changes depending on the amount of time people are waiting in line. This can be tackled by restricting the amount of time people have to join a game and participate by creating a preset timer. 

Depending on the social setting, the internet connection would be better or worse and thus might cause the game to not work as well. Playing the game in an airplane would be much harder than playing the game on a school bus, or tour bus, while playing the game at a movie theater would have the best internet connection.

Pixel assignment is another challenge we would have to face. For instance, our group needs to figure out how many pixels per picture would be assigned to a certain person. This would depend on the amount of participants in each game. Each game would have a different amount of pixels assigned to a person. However, this would make the game unfair if some games were harder than others.

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Game frequency would also need to be predetermined since each social setting has a different type of duration and thus allows for different amounts of time to play games. In an airplane, for example, people would be flying for varying amounts of time, so we would need to set a limit on the amount of times played. However, in a movie theater, a person will only have 15 minutes or so to play the game.