Walk

You decide how tall she is, from a nanometre to a billion kilometres, and while it changes she walks, with the world coming past at its true size next to hers: an apple, a door, a block of flats, a mountain, the Moon. Let go and she slows to a stop. People and animals on the ground stand and watch; the traffic keeps driving.

Keys. Up and down arrows grow and shrink her while held, and she walks while her height is changing and for a moment after. Holding a finger or the mouse on the screen itself makes her walk. The buttons do the same on a touch screen. The tiers are the scale tiers from the tree. The address updates as you go, so a height can be shared.

Proportions are those of an average adult; weight assumes the same build at every size. Her mood is Gentle unless you say otherwise. The art is generated and then reduced to thirty-two colours; the originals are the sort of thing a 1990 Amiga could not have shown, which is the joke.