This is The 8-Bit Guy's new game, Attack Of The PETSCII Robots.
In case you haven't heard of it, this game debuted on the Commodore PET, using entirely PETSCII graphics and 1-bit sound. Then it got ported to about 73 different computer platforms overnight. Okay, it's actually more like twelve, but seriously: every major 8-bit platform of the 80s is either represented or in progress.
Prices range from $10 for a digital version up to $50 for an autographed box.
My favorite versions so far are the C128 and Amiga versions, although I got the original PET/VIC/C64 version as well. Each of these versions looks, sounds, and plays a little different, so if you can afford to buy them all - do. Since the ports are done by different people, they all have a little different flavor, which keeps them fresh.
PET, VIC-20, and Commodore 64: https://www.the8bitguy.com/product/petscii-robots/
Commodore Plus 4: https://www.the8bitguy.com/product/petscii-robots-for-commodore-plus-4/
Commodore 128: https://www.the8bitguy.com/product/petscii-robots-for-commodore-128/
Commodore Amiga: https://www.the8bitguy.com/product/petscii-robots-for-amiga/
ZX Spectrum: https://www.the8bitguy.com/product/petscii-robots-for-zx/
Apple ][: https://www.the8bitguy.com/product/petscii-robots-for-apple/
David also just previewed the Atari 7800 and Sega Genesis versions, which look fantastic.