Google Code-in

We are trying to create some group maths game that students group can work with. it should consist of 10 levels with different points dependent on the difficulty. You can see the example GUI here.
For the groups to be differentiated, at the beginning of the app ask for group count, and assign a letter for each group, then while answering, students should use their letter to answer, for example group "A" found the answer first and it's the second choice so in the answer field the group should type: "A2". Then the scores should be evaluated for each group and given to them at the end of 10 levels to see who is the winner. (Please note the question will expire if 1 group answers it so you must proceed with the next question.)
You can be creative and create a checkbox for each group, so when a checkbox is chosen and the answer is given, the score goes for that group.(Any solution is accepted to identify the group that answers the question.) This game is good for entertaining students while only using 1 PC which is important.
submit the github repo .