diff --git a/Makefile b/Makefile
index 58abe0f..70fd8d9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,13 @@
-CC=gcc
-CCARGS=
+CC?=gcc
+CFLAGS+=
 
 all: 2048 2048_no_curses
 
 2048: 2048_curses.c
-	$(CC) $(CCARGS) 2048_curses.c -lcurses -o 2048
+	$(CC) $(CFLAGS) 2048_curses.c -lcurses -o 2048
 
 2048_no_curses: 2048_no_curses.c
-	gcc 2048_no_curses.c -o 2048_no_curses
+	$(CC) $(CFLAGS) 2048_no_curses.c -o 2048_no_curses
+
+clean:
+	rm -f 2048 2048_no_curses