Not sure, added Makefile

Makefile

@@ -0,0 +1,25 @@
+TARGET = TowerDefense
+SRC_FILES = main.cpp Game.cpp
+
+CXX = g++
+CFLAGS = -Wall -g -lsfml-graphics -lsfml-window -lsfml-system
+
+OBJECTS = $(SRC_FILES:.cpp=.o)
+
+ifeq ($(shell echo "Windows"), "Windows")
+	TARGET := $(TARGET).exe
+	DEL = del
+else
+	DEL = rm
+endif
+
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+	$(CXX) -o $@ $^
+
+.cpp.o:
+	$(CXX) $(CFLAGS) -o $@ -c $<
+
+clean:
+	$(DEL) $(TARGET) $(OBJECTS)