Brainstorming the game and interaction design

When disscuss with teamates about the game content and interaction design, we are thinking,

1) keep the game simple, passive interaction:
Considering the safety issue and some users may feel embarrassing to interact in public space, we should keep the game simple, and passive interaction allowing passengers play with the digital wall freely. The space on the platform is limited. To avoid children may want to chase the game or fall into the platform, the speed of the game is moderate.

2) connect the game with Olympic spirit (ball + flag + Olympic logo):
In view of people have their own supporting countries, we think about using flag balls to trigger users' motivation. People's attention may focus on their countries flags and trying to pop as many as balls to win for their countries. Besides, the background should have the Olympic logo as metaphor of connection to Olympics.

===========================================================================