Playground
Things everybody asked for.
Each of these started with a claim I wanted to see proved rather than assumed — that three rules make a flock, that a whole world can live in one string, that a bank shot is geometry and not luck.
The character
There is someone who lives on this site. A and D run him along the headings, W jumps and S drops through. Press F and gravity goes away — then he floats wherever you point him and E follows whatever he is hovering over, which makes him a slower, sillier mouse for the entire site.
Shift + P anywhere