diff --git a/Makefile b/Makefile
index 3a7ba4c..b702aab 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-CFLAGS= -Wall -g -Wextra  -g
+CFLAGS= -Wall -g
 
 all: gb
 
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0beb011
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+# gameboy emulator
+
+* only for x86-64
+* dependency: sdl2
diff --git a/zelda.sav b/zelda.sav
deleted file mode 100644
index 7dac3ef..0000000
Binary files a/zelda.sav and /dev/null differ