For the same reason there obviously is a way to do ray tracing of 3D scenes on a modern-day TI-84 Plus CE graphical calculator.

Of course, with TI-84 Plus CE graphing calculators selling for $117 and up, I doubt anyone is going to buy one just to play a game from 30+ years ago.

The calculator in question is a TI-84 Plus CE model made by Texas Instruments, featuring a small 2.8-inch 320 x 240 color screen.