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Andrzej Mazur

@end3r.bsky.social
1.7K followers 80 following 474 posts

Web Game Developer, Enclave Games studio founder, js13kGames compo creator, Gamedev.js starter, Gamedev.js Weekly newsletter publisher, W3C Games chair, GitHub Star, OP Guild head.

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Jupiter @jupiterhadley.com · 05/10/2026
Check out part 4 of my #JS13k games compilation video series: youtu.be/_EhauRs6JFA
youtu.be
Jupi Plays Indie Games: ALL THE GAMES [JS13k Games 2026] [Part 4]
YouTube video by Jupiter_Hadley
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Jupiter @jupiterhadley.com · 05/10/2026
Here's another part of my #js13k Games compilation: youtu.be/Z0dGW8A_Nv0
youtu.be
Jupi Plays Indie Games: ALL THE GAMES [JS13k Games 2026] [Part 3]
YouTube video by Jupiter_Hadley
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Jupiter @jupiterhadley.com · 05/10/2026
Playing through more of the #JS13k games! youtu.be/O4SwU4gjnIw
youtu.be
Jupi Plays Indie Games: ALL THE GAMES [JS13k Games 2026] [Part 2]
YouTube video by Jupiter_Hadley
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Cutout @cutoutstudios.com · 03/10/2026
Finally finished our #JS13K postmortem. Come learn about #WebGPU! github.com/cutout-studi...
github.com
js13k-2026/docs/POSTMORTEM.md at main · cutout-studios/js13k-2026
MISSION: DARKWHITE. Contribute to cutout-studios/js13k-2026 development by creating an account on GitHub.
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Andrzej Mazur @end3r.bsky.social · 05/10/2026
Behold, here are the overall WINNERS of the #js13k 2026 competition! 🎉 1. Spectral Horn by Filip Paulů 2. Panzercorn by Chris Subagio 3. HueCorn by Ryan Tyler Post: js13kgames.com/2026/blog/wi... Results: js13kgames.com/2026/#winners Congratulations and thank you all! #gamedev #gamedevjs
js13kGames 2026 winners
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Andrzej Mazur @end3r.bsky.social · 02/10/2026
Voting for the best #js13k 2026 entries ends soon! Do you have any favourites or guesses who could win? js13kgames.com/2026/games #gamedev #gamedevjs #gamejam #compo #competition #countdown #voting #winners #JavaScript #HTML5
Countdown to the js13kGames 2026 voting deadline
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Reposted by Andrzej Mazur
Nallebeorn @nallebeorn.se · 02/10/2026
I made a game for js13kGames this year, and published a blog post about the making of it: nallebeorn.se/blog/js13k20... #js13k #gamedev 🦄🌈
nallebeorn.se
Making a 3D platformer in 13K – Nallebeorn
This year I participated in js13kGames for the first time, making a little 3D platformer called Unifrost. I think the game turned out great! Working under interesting constraints and with a deadline u...
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Frank Force @frankforce.bsky.social · 29/09/2026
every SP13KTRA skybox, stacked 🌈 all eight panoramic skies are now baked into textures for the Dreamcast port. It draws faster and looks better too! 👍 #dreamcast #homebrew #js13k
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Frank Force @frankforce.bsky.social · 29/09/2026
SP13KTRA for Dreamcast v1.12 🌈🚀 big push for 60 fps on real hardware. way fewer verts, baked skybox, DMA to the PowerVR, plus VMU screen support! thanks to everyone who tried it on hardware 🙏 free download 👇 github.com/KilledByAPix... #Dreamcast #homebrew #js13k
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Frank Force @frankforce.bsky.social · 27/09/2026
My JS13K game SP13KTRA is now available on Dreamcast! 💿 All 8 tracks, 60 fps, VMU saves, full soundtrack. More about how I did it in this thread. 🧵 #dreamcast #homebrew #js13k #claude
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Gleb Volkov @glebv.bsky.social · 26/09/2026
What happens if you put Tempest on the beat, add a unicorn and rainbows, then squeeze it all into 13KB? UNxR. Ta-da! 🦄🌈 #ScreenshotSaturday #js13k
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Andrzej Mazur @end3r.bsky.social · 02/10/2026
Issue #665 of Gamedev.js Weekly newsletter about Halo in the browser, LittleJS Jam 3, and Defold 1.13.2 is out - go check it! gamedevjsweekly.com/665 #HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter
gamedevjsweekly.com
Halo in the browser, LittleJS Jam 3, and Defold 1.13.2
Check out issue #665 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
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Andrzej Mazur @end3r.bsky.social · 25/09/2026
Our fourth #js13k Community Soundtrack is up on Bandcamp already, thanks to João Lopes yet again. You can listen to some great music from this year’s games, and add yours to the album too. js13kgames.com/2026/blog/co... #gamedev #gamedevjs #soundtrack #music #sounds
js13kGames 2026 Community Soundtrack
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Andrzej Mazur @end3r.bsky.social · 25/09/2026
Issue #664 of Gamedev.js Weekly newsletter about 10M gameplays, 3D Gaussian Splatting, and Robot Rivals is out - go check it! gamedevjsweekly.com/664 #HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter
gamedevjsweekly.com
10M gameplays, 3D Gaussian Splatting, and Robot Rivals
Check out issue #664 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
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Reposted by Andrzej Mazur
Jupiter @jupiterhadley.com · 24/09/2026
Got some of my JS13k Games Coverage: #gamejam #js13k youtu.be/nN41Fv3gkj4
youtu.be
Jupi Plays Indie Games: ALL THE GAMES [JS13k Games 2026] [Part 1]
YouTube video by Jupiter_Hadley
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Victor @javascripl.bsky.social · 23/09/2026
Next game to re view in #js13k is "BLADE:13 - PRISM BREAK" js13kgames.com/2026/games/b...
js13kgames.com
BLADE:13 - PRISM BREAK
A game in the js13kGames 2026 competition. Play it now, for free!
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Gleb Volkov @glebv.bsky.social · 21/09/2026
Since 2021, #js13k has grown into five games, each within 13 KB: Space Arcade, Enchanted Dungeon, XIII Floor, Catapoolt and UNxR. Along the way: Miniracers, a 64×64 px PICO-8 racer for #LOWREZJAM. Latest: SUPAPONG - PONG × SUPERHOT in less than 1 KB for #pico1k. So far ↓
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Cutout @cutoutstudios.com · 20/09/2026
We learned during #JS13K that debugging game loops is an absolute pain: so we've proposed a change to the #WHATWG console to make it a little bit better. The `%t` token: github.com/whatwg/conso...
github.com
Proposal: `%t` topic/tag/tab token · Issue #255 · whatwg/console
What problem are you trying to solve? I just finished participating in js13kgames.com and lemme tell you, debugging game loops are a pain, mainly because you cannot reasonably work with 10,000 logs...
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Gleb Volkov @glebv.bsky.social · 19/09/2026
Here’s a 64×64 PICO-8 demake of the UNxR logo reveal animation from my #js13k 2026 entry. Source code: just 292 chars 👇 www.lexaloffle.com/bbs/?tid=159... Play UNxR & vote for it: js13kgames.com/2026/games/u... #pico8 #postcart #gamedev #pixelart #demake #indiedev
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Gleb Volkov @glebv.bsky.social · 18/09/2026
People ask what UNxR means. It’s pronounced “UNKser”: UN and R are the first letters of this year’s #js13k theme. R also stands for Rhythm, the core mechanic; x marks the crossover with Tempest-style gameplay. And if you dig a bit deeper, the whole name is a subtle nod to TxK.
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Frank Force @frankforce.bsky.social · 18/09/2026
i wrote a short blog post about my js13k games. working on a longer one that explains more technical details about how i made sp13ktra. frankforce.com/i-made-4-gam... #js13k
frankforce.com
I made 4 games for JS13K 2026
Four Games in 13 Kilobytes I’ve been participating in JS13K since 2019 and this year I wanted to take it to a new level. So I didn’t make one game, I made four. Each game fits in a 13 K…
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Frank Force @frankforce.bsky.social · 17/09/2026
here's a top down view of all 8 tracks in SP13KTRA 🌈 every track is built procedurally, the full 3D road with banked turns, hills and crossovers, and all the scenery. each one has its own theme, palette, and building shapes. and the whole game fits in 13 kilobytes! #js13k
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Hogias @hogia.bsky.social · 16/09/2026
I would appreciate feedback for this one to make the director's cut better. If you have a github account and you enjoy playing it please leave a feedback. #js #gamedev #webgl #js13k #game #minigame
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Frank Force @frankforce.bsky.social · 16/09/2026
full soundtrack for my 13k game SP13KTRA is up on soundcloud soundcloud.com/user-2986066... the mp3 is about 400x bigger then the game itself! 🤔 #js13k
soundcloud.com
SP13KTRA Soundtrack
the soundtrack for SP13KTRA, my anti-gravity racing game for js13k 2026. the whole game fits in 13 kilobytes, including the music. 🌈🚀 every song is generated from a single number. a seeded random g
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Hogias @hogia.bsky.social · 16/09/2026
Check out Unicorn Dream, my entry for @js13kGames 2026! #js13k #gamedev #js js13kgames.com/2026/games/u...
js13kgames.com
Unicorn's Dream
A game in the js13kGames 2026 competition. Play it now, for free!
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Gleb Volkov @glebv.bsky.social · 16/09/2026
Meet UNxR 🦄🌈 - my @js13kGames 2026 “Unicorns & Rainbows” entry. 13KB. 99 levels. 16 arenas. 5 enemy types, each with unique behavior - Tempest × rhythm game crossover. Miss the beat, lose your turn! Play & vote 👇 js13kgames.com/2026/games/u... #js13k #gamedev #indiedev #indiegame
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Frank Force @frankforce.bsky.social · 16/09/2026
My new game SP13KTRA is out! 🌈 8 racers, 8 tracks, 8 songs, real 3D, and it all fits in 13K. Play in your browser on desktop or phone: mouse, keyboard, gamepad or touch. @newgrounds.com @wavedash.com @itch.io @github.com #js13k #gamedev
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Frank Force @frankforce.bsky.social · 15/09/2026
here's the magic trick behind how I fit 8 music tracks in my #js13k game SP13KTRA. 🌈🚀 every song is defined by a single number. 😯 the random generator uses 26 dice rolls per track for its parameters. i used AI to make this music bench to find a good seed to fit each level.
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Frank Force @frankforce.bsky.social · 14/09/2026
SP13KTRA 🟥🟧🟨🟩🟦🟪 #js13k www.dwitter.net/d/36289 with(x)for(i=c.width|=c.style.filter='invert(',textAlign='center',globalCompositeOperation='xor',font='85em impact';i--;fillText('KTRASP13'[i%8],(i-3-t)*500,1080))fillStyle=`hsl(${i*45},99%,50%`
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Cutout @cutoutstudios.com · 14/09/2026
Very proud to announce you can now rate our game on the #JS13K website - js13kgames.com/2026/games/m... Play and rate some of the other entries while you're there. Everything is very impressive.
js13kgames.com
MISSION: DARKWHITE
A game in the js13kGames 2026 competition. Play it now, for free!
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Aurélio Heckert @aurium.bsky.social · 14/09/2026
My entry for this year's #JS13K This year I made a children's book where the levels are the book's chapters, and you play through the story of a rhinoceros that shoots a rainbow out of its butt. js13kgames.com/2026/games/r... #gamedev
js13kgames.com
Rino Finding Love
A game in the js13kGames 2026 competition. Play it now, for free!
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eoinmcg @eoinmcgrath.com · 14/09/2026
Just about managed to finish sth for #js13k Fun times! #gamedev #littlejs 🦄 Play it here: js13kgames.com/2026/games/g...
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Gleb Volkov @glebv.bsky.social · 14/09/2026
Spotted Cathy de Monchaux’s famous Unicorn at Palais de Tokyo in Paris 🦄 Meanwhile, I was there making my game UNxR for the #js13k contest with a very similar theme: “Unicorns and Rainbows.” 🌈 js13kgames.com/2026/games/u... Check it out!
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Frank Force @frankforce.bsky.social · 13/09/2026
My new game SP13KTRA is an anti-gravity racer inspired by F-Zero and Wipeout! 🏎️🌈 The whole game fits in just 13 kilobytes, including the art, music, engine, and rendering. 👀 Play it right in your browser! #js13k #gamedev js13kgames.com/2026/games/s...
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talesfromuranus.bsky.social @talesfromuranus.bsky.social · 13/09/2026
Finished my first JS13k entry this year with Queenie's Playland js13kgames.com/2026/games/q... While the game ended up much simpler than planned, it really was a blast! #picoCAD2 #js13k
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Juhani Ovalo @yabadaba.bsky.social · 13/09/2026
This year JS13K submission is here: js13kgames.com/2026/games/r... #js13k #game #unicorn #rainbow
js13kgames.com
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Andrzej Mazur @end3r.bsky.social · 18/09/2026
yeah, I remember yours and nothing else, though given the amount I could've missed something - still, someone could've made a game about a Heavy Assault Unicorn, aka Rhino ;D
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Aurélio Heckert @aurium.bsky.social · 14/09/2026
I was expecting MORE games featuring rhinoceroses — after all, the theme of the year was "Unicorns and Rainbows," and they are essentially **real-life battle unicorns**. But so far, I haven't spotted another game with this animal. I wonder if @end3r.bsky.social feels the same...
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Frank Force @frankforce.bsky.social · 14/09/2026
This year JS13K had 317 entries, smashing the previous record! Congrats to @end3r.bsky.social and everyone who submitted. 🎉 It was also the biggest year yet for ZzFX, with 65 entries using it, 51 using ZzFXM, and 8 games made with LittleJS Engine. 😄👍 #js13k
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Andrzej Mazur @end3r.bsky.social · 18/09/2026
Issue #663 of Gamedev.js Weekly newsletter about MTLX, ArmorPaint, and fractal tunnel is out - go check it! gamedevjsweekly.com/663 #HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter
gamedevjsweekly.com
MTLX, ArmorPaint, and fractal tunnel
Check out issue #663 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
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Andrzej Mazur @end3r.bsky.social · 14/09/2026
Now that we accepted all 317 #js13k 2026 entries, it's time to VOTE and pick the best games this year! 🎉 js13kgames.com/2026/blog/vo... Have fun! 🦄🌈 #gamedevjs #gamedev #gamejam #indiedev #indiegames #codegolf #JavaScript #HTML5
js13kgames.com
Voting is open!
The fifteenth yearly edition of the js13kGames competition ended with a record-breaking 317 entries! Last year’s amount was 197 games, and the previous record was 274 games in 2018 - that’s the first ...
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Andrzej Mazur @end3r.bsky.social · 13/09/2026
Issue #662 of Gamedev.js Weekly newsletter about seven terabytes of terrain, 300+ js13kGames entries, and Opusfived is out - go check it! gamedevjsweekly.com/662 #HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter #js13k
gamedevjsweekly.com
Seven terabytes of terrain, 300+ js13kGames entries, and Opusfived
Check out issue #662 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
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Andrzej Mazur @end3r.bsky.social · 13/09/2026
We've received more than 300 #js13k entries this year, which is a record since the very beginning in 2012! js13kgames.com/2026/games We're still helping fix some issues with submissions, and the voting will begin tomorrow, as planned! #gamedevjs #gamedev #gamejam #indiedev #indiegames #codegolf
all js13kGames 2026 entries
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Wiserim @wiserim.bsky.social · 13/09/2026
Submitted my #js13k game at the last minute. My niece like it, so thas's already a win for me. js13kgames.com/2026/games/u... #gamedev #javascript
Screenshot of game submission for js13k 2026 game competition.
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Nicklas Löf @snukey.mastodon.social.ap.brid.gy · 13/09/2026
Just submitted my JS13k game Rainbow Ricochet. js13kgames.com/2026/games/rainbow-r… #js13k #gamedev
A pixelated video game scene featuring a dark, brick environment with a red fog effect. The player's health and bullet count are displayed on the left side. In the background, shadowy figures are visible through a window.
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Ben @binarymoon.bsky.social · 13/09/2026
It has now been submitted. Learnt a lot doing this. I've been making online games for 20 something years, but this is the first time I've worked within strict guidelines. It's been fun, and challenging! #js13k #gamedev #javascript js13kgames.com/games/unicor...
js13kgames.com
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Frank Force @frankforce.bsky.social · 12/09/2026
one last push on SP13KTRA! 🏎️🌈 anti-gravity racing inspired by F-Zero and Wipeout, all in 13 kilobytes. i'm still tweaking the racing and could really use some playtesters. gameplay below, play link in the next post! #js13k #gamedev
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Karthik VJ @karthikvj.bsky.social · 12/09/2026
Go play my #js13k gamejam game! #gamedev #indiegame labrat.mobi/games/hornbo...
labrat.mobi
Hornbound
In this roguelike adventure, you play as a Unicorn on a quest to find the missing rainbows. Explore, survive, and collect them all!
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Andrzej Mazur @end3r.bsky.social · 13/09/2026
We have 200 #js13k entries accepted already, ~40 in the queue, ~60 drafts, and still (a bit less than) THREE HOURS to go before the deadline! js13kgames.com/2026/submit #gamedevjs #gamedev #gamejam #indiedev #indiegames #codegolf #deadline #submit #JavaScript #HTML5
js13kGames 2026 ends in 3 hours
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Andrzej Mazur @end3r.bsky.social · 12/09/2026
Less than 24 HOURS left to submit your game into #js13k 2026, if you haven't done that already - we're now at 160 entries, and ~75 drafts! js13kgames.com/submit #gamedevjs #gamedev #gamejam #indiedev #indiegames #codegolf #deadline #submit
js13kGames 2026 ends in less than 24 hours
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