How it works

Rolling is free and needs no account. It finds a number nobody owns and nobody else is holding, and puts it in front of you for 5 minutes. Nobody else can take it in that time.

Rolling again is what gives the last one back. That is the whole risk of the game: the number in front of you is yours to buy until you go looking for a better one.

A number costs what it is. 7 costs $7, 512 costs $512, and the ten single-digit numbers are the cheapest things in the game as well as the rarest.

Buying needs an account, and holding one while you make an account gives you 15 minutes rather than 5. Nobody may own more than 10 at a time; sell or let one go to make room.

A number you own is a square you can draw on: a background, a pattern, stickers, freehand strokes, and the digits themselves in whatever face and colour you like. The wall is made of those squares, so what you draw is what the game looks like.

Any number you own can go on the market, as an auction, open to offers, or both, from $5 up. A winning bidder has 24 hours to pay; let that lapse and it passes to the next bid down.

The commission is 3% from the seller and 3% from the buyer, never less than $1. What a sale earns lands in your balance, to spend here or to take out.