gno.land/r/moul/x/games/idle/v0

A mine that keeps working while you are not looking at it: Start, Claim, Upgrade, Prestige.

maketx call ... -func Start      # open a mine at level 1
maketx call ... -func Claim      # bank what it dug
maketx call ... -func Upgrade    # spend the bank to dig faster
maketx call ... -func Prestige   # at level 10: reset for a permanent multiplier

Ore accrues at a rate set by your level. There are no turns, no block hook and no keeper: the realm stores what you had and when, and everything else is arithmetic done at the moment somebody asks. Render("") is the board, Render("<address>") is one mine's card.

The numbers move on their own. Refresh the page a minute later and the mine has dug more, with no transaction in between, because every figure comes from the read-only projection rather than from stored state. That is a live dashboard with no frontend, no indexer and no JavaScript, which is the one thing this chain gives you that the others charge for separately.

Three decisions make it a game rather than a counter:

• The mine is small. It holds 120 periods of production and then spills. Without a ceiling the optimal play is to never log in and claim once at the end, which is a savings account. The ceiling scales with the rate, so the fill time stays two hours at every level and showing up is the only skill. Removing it turns five tests red.
• Upgrades are quadratic against linear production. Level L costs 10*L*L and pays L per period, so the next level always takes about 10*L periods to afford. Linear against linear never ends; exponential against linear dies at level four.
• Prestige exists. Without a reset the leaderboard is settled by whoever started first and nobody else has a reason to join. Trading a level-10 mine for a permanent multiplier means a player starting today has a reachable ceiling. Banked and pending ore burn; the lifetime total does not.

Nothing rolls dice. Every outcome is a pure function of when you acted, so there is no block hash to grind and no ordering to front-run, and the card can tell you exactly what an action produces before you sign it. Combat games reach for randomness and inherit a validator-manipulable seed; this one does not need to.

Time is unix seconds from the block, not block height: a height-denominated economy silently reprices itself whenever the chain's block time moves.

The arithmetic is p/moul/x/games/accrual, which owns the rule that makes lazy time honest. Claiming every period and claiming once pay exactly the same, right up to the point where the mine fills, and that limit is the design rather than the arithmetic.

Part of moul/gno-contracts — moul's versioned gno.land contracts. See the repository for the full catalog, build/test tooling, and usage.

Dependency graph:

🧪 Highly experimental — potentially vibe-coded. Not audited; may break, change, or be removed at any time. Do not use with anything of value. Full disclaimer: DISCLAIMER.