Rounded rectangles?
Cosmetic Changes, New Game Menu

Unincluded new game menu, still needs functionality.

Changed yellow to brown as it was hard to see
Changed FPS to 10, to improve performance.

Reduced roundedness of the rectangles. Still thinking we should go with
perfect rectangles.
Refactoring

Split Cell and Grid into two separate objects to reduce global variables
and code mess.

Still not done, can't guarantee working.