I liked the 32F746GDISCOVERY which is $56 at Digikey. It has a Cortex-M7 CPU, 1 MB built-in flash, 8 MB of SDRAM, and a 480x272-pixel touchscreen. Games can go on a microSD card. There's a USB OTG port you can use for input.
A low-res screen like this works well because the chip can't rescale its video output.
ST provides libraries for all the peripherals so it's pretty easy to jump in if you know C. I think microPython works on a lot of these boards, too.
A low-res screen like this works well because the chip can't rescale its video output.
ST provides libraries for all the peripherals so it's pretty easy to jump in if you know C. I think microPython works on a lot of these boards, too.