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I have a javascript/typescript module for packing arbitrary data into a cartridge that I use for a handful of my projects. I recently published it as an npm package as I thought it may be helpful to more people.

Below is an example cart where I used this package to quickly prepare a cart with a payload of polygonal shape data, followed by the script that was used to build it.
(The resulting p8 cart was exported as a png cart separately)

Use ◀️/▶️/🅾️/❎ to change shape.

Cart #p8_data_cart_example-0 | 2025-06-26 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

import { readFileSync, writeFileSync } from 'fs';
import { CartData, writeCart } from 'p8-data-cart';

const shapes = 

[ [size=16][color=#ffaabb] [ Continue Reading.. ] [/color][/size] ](/bbs/?pid=169178#p)
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Cart #kbo_sugarplum1-0 | 2025-06-26 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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From the second stage of A Pico-Sized Holiday Ninja Game 2024 (https://www.lexaloffle.com/bbs/?tid=145965).

It checks the sfx and notes playing on channel 1 and generates particles around that.

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Cart #wamobegire-2 | 2025-07-01 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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Hi there!
I challenged myself to build a tiny generative AI in PICO-8 that predicts a sentence word by word — and here’s the result!

You can easily plug in a different training dataset to explore various generation themes like zen, cooking, or radio. Right now, the default dataset is still pretty limited — but it's a starting point!
You can also tweak the context size in init() — that’s the number of previous words the model looks at when predicting the next one.

Have fun experimenting — enjoy!

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Cart #ffiyyabu-0 | 2025-06-26 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

A start to some of the mechanics in my puzzle snake game

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Cart #gehezanobi-0 | 2025-06-26 | Code ▽ | Embed ▽ | No License
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My multi-modal text for my English Assessment Task 2.
Notes for markers:
All code in this is original, made by me.
Some sprites aren't - all taken sprites are cited in my bibliography.
Code can be viewed by pressing the small "Code ▽" button beneath the main area.
A transcript of the text is shown in part B of the submission for easy viewing.

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Cart #gakepiyowo-0 | 2025-06-26 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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This is the first time I have used pico8 to create a complete game. It adopts the oop game concept, but actually, I think there is still a bit of componentization in it, but it is not completely decoupled. Here, I used the anim,box, and sprite classes to complete this small game of mine I also learned a little bit about the methods of pico8 music production, which is very interesting. I will be looking forward to combining the gameplay and music more ingeniously in the future

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Cart #hatabuyepo-0 | 2025-06-26 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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Cart #eggecs-0 | 2025-06-25 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

Evergreen Games Pico-8 Entity Component System (EGG-ECS)

I was inspired to have another go at writing a simple ECS for pico-8.
This one takes only 270 tokens and is quite efficient and extensible.
It is a very traditional and otherwise minimal ECS that I created to have a simple and flexible interface. For example, systems are called on user demand, letting you create coupled systems in a simple way and have direct and flexible control over your code execution.

Full documentation is within the cartridge!

I hope it can be of use.

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Bad demo of my sfx cache.

Press Z or X to queue a sound effect, which will be played on the beat.

Uses stat(50) to determine when to play any queued sfx.

The track is "puzzle" by gruber, provided for the Toy Box Jam.

Cart #fepopmeze-1 | 2025-06-25 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

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Cart #testgametestgame-0 | 2025-06-25 | Code ▽ | Embed ▽ | No License
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Cart #tower_of_the_sorcerer_demo-0 | 2025-06-25 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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Cart #zawoyanepi-0 | 2025-06-25 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

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Cart #fekonogibu-0 | 2025-06-25 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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I suck at describing anything, hence the beautiful diagram provided. I've been taking cracks here and there trying to break it down, get the little bits and pieces of this working before diving into the whole thing to very mixed results.

Current issue is getting (and understanding) those fancy squares to move and loop along a designated path.

Yes, I was consumed by the ro-sham-bo minigame brainrot that were in a handful of GBA games. Some guidance would be much appreciated

https://imgur.com/a/d3SeOQB

Because the thing™ didn't upload

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Cart #lifediversv06-2 | 2025-06-25 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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Hey! This is my first Pico-8 game.

I was using Dylan Bennet’s ( @MBoffin) zine Game Dev with Pico-8 and following the first tutorial to develop a version of Cave Diver in Pico-8. After experimenting with the theme a bit, I decided to create this little game. I hope you enjoy it!

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Cart #pico_ops_war_tactics-2 | 2025-06-24 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

Hiiii I'm new here so consider this my introduction ~ I made this lil strategy RPG over the last month or so as my first tiny game dev project! It began life as an Advance Wars demake but there's also some mechanics inspired by stuff like FE and Into the Breach, ie permadeath and a perk shop. Let me know if you find any bugs or if there's anything counterintuitive that needs a dialog explainer :)

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Cart #fojumojoje-1 | 2025-06-24 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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The Pig Game is here to replace the classic Dino Game!
When the internet's down, help your pixelated pig dodge obstacles and survive as long as possible!
I hope you enjoy!

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Cart #hiugo_space_particles-0 | 2025-06-24 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA
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Tried to create a particles system inside pico-8, I'm actually happy of how it turned out :)

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Cart #gomoku_ai-1 | 2025-06-24 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

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when trying to use cartdata() I get error saying it only works in CE. I've only downloaded and installed the version emailed to me. what am I doing wrong?

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