Fixed class organization

Makefile

@@ -8,9 +8,7 @@ fresh: dirs compile link
 
 compile:
 	g++ $(INC) $(STD) -c -o build/main.o src/main.cpp
-	g++ $(INC) $(STD) -c -o build/common.o src/common.cpp
 	g++ $(INC) $(STD) -c -o build/display.o src/display.cpp
-	g++ $(INC) $(STD) -c -o build/game.o src/game.cpp
 	g++ $(INC) $(STD) -c -o build/gamestate.o src/gamestate.cpp
 	g++ $(INC) $(STD) -c -o build/snake.o src/snake.cpp
 	g++ $(INC) $(STD) -c -o build/snakefood.o src/snakefood.cpp
@@ -19,7 +17,7 @@ dirs:
 	mkdir bin build
 
 link:
-	g++ build/*.o -o bin/SnakePlusPlus $(SFML)
+	g++ build/*.o -o bin/SnakePlusPlus.out $(SFML)
 
 clean:
-	rm bin/*.o build/*.out
+	rm bin/*.out build/*.o