Microsoft Imagine cup, what kind of game idea would be more likely to be appreciated?

Hello and Salam every one,So the thing is that i am going to participate in microsoft imagine cup 2012, I intend to make a game for this purpose, The ideas i currently have under consideration are1)Vocabulary, word blinks than you got to shoot the right letters in right sequence(a really short description of game)2)a fun game, using G Sensors, balls and a maze3) Mathematical, open the door by figuring out the correct combination of sacks of different weights and placing them in right place to make the bar intercept a laser resulting in shut sown of security system.4) Bey Blade game, multiplayer, G Sensorssince its my first time for any such competition I'd really appreciate any kind of advice about which game idea should i go with or if i need to think of some other ideas... thanks in advance