GDash – A Feature-Rich Boulder Dash Clone for Mac, Win and Linux

Enjoy, it’s still one of my favorites: https://github.com/sergiou87/open-supaplex

I'm probably a bit younger, but I remember Rocks'n'Diamonds having Boulder Dash and Supaplex levels in it too.

Layers of operating systems and APIs? DOS, Win16/Win32/Win64, Kernel, User, GDI/DirectX, etc. and many versions of them from Win 1, 2, 3, NT, 95, etc. And of course computers getting orders of magnitude faster/larger/cheaper with efficient/lazy human nature.

I used to program Atari assembly/machine language (even made a Boulder Dash clone with level editor back in the day) but wouldn't do it today except for a gag/laugh or reminiscing.

Nothing prevents you from writing the same game in assembly on top of the frame buffer of the BIOS. It will be a major PITA (I did that in the past), but I’m sure you’ll enjoy the small size of the binaries.