# SpotFast

> A free visual memory game that runs entirely in the browser. A 6x6 grid of
> thirty-six different things appears for about three seconds and then turns
> face down. Three clues follow, each pointing at exactly one tile, and three
> wrong taps end the run.

Canonical URL: https://spotfast.lowkey.tools/
Part of: https://lowkey.tools, small free tools by Shrinath Prabhu
Access: free to play, no account, no adverts, no in-app purchases

## How a round works

1. A fresh board of 36 distinct items is dealt, no two the same, drawn from a
   pool of roughly 180 emoji tagged with a category and, where it is
   unmistakable, a colour.
2. The board is shown face up for a countdown of about three seconds. The look
   shortens by 140ms each round, down to a floor of 1.7 seconds.
3. Every tile turns face down and three clues are asked one at a time. Each
   clue is generated from the board itself and verified to have exactly one
   answer before it is shown.
4. A correct tap flips that tile back up for good. A wrong tap briefly shows
   what was really there and costs one of three lives.
5. Clearing all three clues ends the round. Three cleared rounds in a row hand
   one life back, never above the starting three.

## Kinds of clue

- Identity: "Where was the penguin?"
- Whole-board uniqueness: "Exactly one vegetable was on the board."
- Colour uniqueness: "Exactly one purple thing was on the board."
- Region uniqueness: "Exactly one fruit sat in the highlighted column."
- Neighbour: "Tap the tile directly right of the drum."
- Diagonal: "Tap the tile diagonally down-left of the rocket."
- Intersection: "Tap the tile in the same row as the apple and the same column
  as the guitar."
- Gap: "The shark and the scooter had one tile between them. Tap that tile."
- Adjacency: "Of the four tiles touching the star, exactly one was a savoury
  food."

Rounds one to three mix in easier clue kinds and outline the quarter of the
board holding the answer; from round four the clues stand alone.

## Scoring

- 100 for a solved clue, plus up to 120 for speed and 0/30/70 by difficulty.
- 250 for clearing a round, plus 150 if the round had no wrong taps.
- Everything is multiplied by 1 + (round - 1) / 10.

## Privacy

There is no server, no account, no analytics of gameplay content and nothing to
upload. The best score, best round and running accuracy live in this browser's
localStorage and never leave the device. Clearing site data clears them.

## Technology

Plain ES modules, no framework or bundling. A static build copies public files. Installable as a progressive
web app and fully playable offline after the first visit. Keyboard playable:
arrow keys move around the board, Enter or Space chooses a tile.

## Links and credits

- [Play SpotFast](https://spotfast.lowkey.tools/): the official game.
- [Common questions](https://spotfast.lowkey.tools/#faq): rules, scoring, offline play and keyboard controls.
- [Shrinath Prabhu](https://shrinath.me): SpotFast’s maker.
- [Follow the maker](https://x.com/shrinath_prabhu): updates from @shrinath_prabhu.
- [OwlEye Analytics](https://owleye.dev): another product by the maker of SpotFast.
- [lowkey.tools](https://lowkey.tools): the collection SpotFast belongs to.
- [Chesscape](https://chesscape.lowkey.tools): find the saving chess move before the thirty-second timer runs out.
- [Sitemap](https://spotfast.lowkey.tools/sitemap.xml)