Game Board or game area must be done relative to the screen size

[emadaltaki]

A lot of users are complaining about the Game Board or game area that is too small in some devices which make it hard for the users to swipe the tiles. The optimal way is to use widgets or functions with relative values instead of strict values.

[michaelnares]

@uberspot I have made some changes so that it builds successfully. I was hoping to work on this one as well. Would you add me as a collaborator so that I can submit a PR, please?