added exit by escape key -xyious

test.cpp

@@ -15,6 +15,9 @@
 
 // this should be handled elsewhere, eventually, maybe, probably
 static void on_key(void *user, uint32_t keycode, uint32_t state) {
+  if (keycode == 1) {
+  	exit(1);
+  }
   (void)user;
   const char *label = state ? "down" : "up  ";
   printf("key %s: %u\n", label, keycode);