Many issues restructuring the program, needs cleaning

Makefile

@@ -1,25 +1,25 @@
-INC := -I include
-STD := -std=c++11
-SFML := -lsfml-graphics -lsfml-window -lsfml-system
-
-all: compile link
-
-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
-
-dirs:
-	mkdir bin build
-
-link:
-	g++ build/*.o -o bin/SnakePlusPlus $(SFML)
-
-clean:
+INC := -I include
+STD := -std=c++11
+SFML := -lsfml-graphics -lsfml-window -lsfml-system
+
+all: compile link
+
+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
+
+dirs:
+	mkdir bin build
+
+link:
+	g++ build/*.o -o bin/SnakePlusPlus $(SFML)
+
+clean:
 	rm bin/*.o build/*.out