add scaffold for 2048

Makefile

@@ -8,9 +8,11 @@ SRC := src/engine/engine.c \
 OUT := build/main
 SNAKE_SRC := src/examples/snake.c $(SRC)
 SNAKE := build/snake
+2048_SRC := src/examples/2048.c $(SRC)
+2048 := build/2048
 
 build:
-	$(CC) -o $(OUT) src/main.c $(SRC) $(INC) $(LIBS)
+	$(CC) -o $(OUT) -O3 -DNDEBUG src/main.c $(SRC) $(INC) $(LIBS)
 
 run:
 	$(OUT)
@@ -24,6 +26,15 @@ run-snake:
 clean-snake:
 	rm $(SNAKE)
 
+build-2048:
+	$(CC) -o $(2048) -O3 -DNDEBUG $(2048_SRC) $(INC) $(LIBS)
+
+run-2048:
+	$(2048)
+
+clean-2048:
+	rm $(2048)
+
 clean:
 	rm $(OUT)