Portugues
Kuro Neko Market
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About the game
Your owner got tired of you lounging around the house, so you now work at the fish market. The job looks simple. Fish ride past on a conveyor belt, you pick one up with a big black paw, decide how much it should cost, type that price on a little printer, and stick the label that comes out on the fish before it goes back on the belt. When the fish returns, the game checks your guess: a right price earns you points and a wrong one earns nothing.
The catch is the maths. A notebook on the counter lists what each kind of fish is worth, and the extras that change it: a scale pattern, a size, a mark that adds or takes away a few cents. Every fish is the sum of several small rules, and the clock keeps running while you add them up. The three main levels bring different fish, different speeds and a different rate of new arrivals, and every run adds a random set of modifiers, so memorising the answers does not work for long. A fourth level lets you choose which fish may appear, to practise the ones you find hard or to leave out the ones you dislike.
It looks like pixel art, but everything is vector art drawn by code onto a small canvas that is then enlarged without smoothing. Federico Tibaldo made it for js13kGames 2025, where the whole game had to fit in 13 kilobytes and the theme was "Black Cat".
Playing it here
Click Play, then click anywhere to get past the title screen and pick a level from the list. The game needs only the left mouse button, so it also works with a finger on a touchscreen. Sound effects start after your first click. Your progress on each level is kept in your browser.
Controls
| Input | Action |
|---|---|
| Click / tap a fish | pick it up from the belt |
| Click the digits on the printer | type the price (the cross clears it) |
| Click the tick | print the label |
| Click the label, then the fish | stick the price on the fish |
| Click the notebook | flip to the next page |
| Click a fish in the custom level | allow it or leave it out |
A few things worth knowing
Read the notebook before you grab. Work out the price in your head while the fish is still on the belt, and only then pick it up.
Take the easy ones first. A fish with few modifiers is quick money, and the ones with many can wait for a gap in the line.
Practise with the custom level. Switch on only the fish you get wrong and play it until the arithmetic comes without thinking.
Credits and licence
Kuro Neko Market was made by Federico Tibaldo and released under the GNU General Public License version 3 or later. As the licence requires, the complete source code of the build served here is hosted alongside the game. The sound effects use ZzFX by Frank Force (MIT), and the digits are drawn from paths traced from the Fredoka typeface (SIL Open Font License); the licence texts are linked from this page. The source is also on GitHub.