+extern void record_control(int action, struct World * world);
+extern uint8_t player_control(int key, struct World * world);
+
+
+
+/* Call by "key" game / window management actions that don't influence the
+ * player character. If the "quit" action is called, return 1 (instead of
+ * exiting directly).
+ */
+extern uint8_t meta_control(int key, struct World * world);