In the same vein, there's an old DOS assembler trick from the late 80's through the mid 90's - remap INT 20h (which was a 1-byte opcode to exit the currently running program), to INT 21h (a 2-byte instruction for DOS, which includes a clean exit for the program as a built-in function). This could break how programs exit cleanly, but probably never did. In a substantial program, it saved a lot of bytes in DOS calls.
It was mostly used competitively, but it was a pretty stable code size hack.
Note that the drawing one does NOT work on iOS. Just keeps trying to refresh the page because you're pulling down. Can only make little errant marks.
My follow up question would be, how do you envision sharing a sheet? With someone right next to me, and with someone across the world. With or without internet access, seeing that this office suite is offline-first.
FTA >this project is only a half-joke,
They aren't even selling this as being serious, let alone saying this is great for small underpowered computers in developing nations.
This is basically a sizecoding challenge. They did it, they're presumably happy with it. If you want to come back with a boot sector office suite, you'll get my upvote, but pissing over someone's "half-joke" just wastes everybody's time.