Added classes
	modified:   Game2DExercise/Game2DExercise.vcxproj
	modified:   Game2DExercise/Game2DExercise.vcxproj.filters
	new file:   Game2DExercise/GamePlaying.cpp
	new file:   Game2DExercise/GamePlaying.h
	modified:   Game2DExercise/main.cpp