1980s Radio Shack Astro Thunder Electronic Game Made in Japan in Full hotsell Working Order

This was my daughter's and it's been carefully stored for decades. It takes 4 C batteries, not included. There is a port for an hotsell power adapter but I don't have one. I put some batteries in and it works great still. It still has a protective film on the display that probably was meant to be removed but it's protected the screen. Both speakers and the joystick works. I don't think it got much use.