[Mashimo]

There is also .kkrieger (2004) which is 96k

But the thing with what OP did is, that it runs in the browser and uses a common game engine.

[jart]

Oscar Toledo did it in 510 bytes https://github.com/nanochess/cubicDoom

[gbraad]

I know what the OP, but it is not special in the sligtest. Early emscripten ran Quake, a common engine. There is significant bloat in this setup if 35M is some form of measurement.