I've inserted and removed cartridges several times, and confirmed the cross key and B button on the menu screen. I've confirmed the response of the A button, which you use your index finger for, but the button had to be manually returned. I haven't been able to check the aiming operation or the start button because I don't have compatible software or an old TV. The memory card slot is also unconfirmed. There are scratches and dirt overall. Thank you.