Added help text

ui/ui.c

@@ -184,6 +184,7 @@ int show_menu() {
 
     attron(A_DIM);
     printw_center("Use arrow keys to move; Enter to chose", MENU_CHOICE_Y_OFFSET + 10 - menu_offset_modifer());
+    printw_center("Exit the gamemode you entered by pressing CTRL-W", MENU_CHOICE_Y_OFFSET + 11 - menu_offset_modifer());
     attroff(A_DIM);
 
     // Menu choices handler