Andrzej Mazur
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end3r.bsky.social
Andrzej Mazur
@end3r.bsky.social
1.6K followers 61 following 280 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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end3r.bsky.social
#EnclaveGames #MonthlyReport: Every October the js13kGames competition winners are announced, and I also found the time to fly to #SanFrancisco for the #GitHubUniverse conference third year in a row.

enclavegames.com/blog/monthly...

#gamedev #gamedevjs #js13k #GitHub #JavaScript #HTML5
Enclave Games Monthly Report: October 2025
At the beginning of every October the js13kGames competition winners are announced, and I also found the time to fly to San Francisco for the GitHub Universe conference third year in a row.
enclavegames.com
November 12, 2025 at 2:48 PM
end3r.bsky.social
Issue #618 of Gamedev.js Weekly newsletter about Game Off 2025, Spark, and Box2D3-WASM is out - go check it!

gamedevjsweekly.com/618

#HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter #GitHubGameOff #SparkJS #WASM
Game Off 2025, Spark, and Box2D3-WASM
Check out issue #618 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
gamedevjsweekly.com
November 8, 2025 at 10:31 PM
end3r.bsky.social
I was invited for the third time to GitHub Universe happening at Fort Mason in San Francisco, thanks to the GitHub Stars program I’m part of for the fifth year, and enjoyed every minute of it.

end3r.com/blog/github-...

#GitHub #Stars #GitHubStars #GitHubUniverse #FortMason #SanFrancisco
Stars at GitHub Universe 2025
I was invited for the third time to GitHub Universe happening at Fort Mason in San Francisco, thanks to the GitHub Stars program I'm part of for the fifth year, and enjoyed every minute of it.
end3r.com
November 5, 2025 at 3:10 PM
end3r.bsky.social
Issue #617 of Gamedev.js Weekly newsletter about SOG, carve-a-pumpkin, and Pac-Man Halloween is out - go check it!

gamedevjsweekly.com/617

#HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter
SOG, carve-a-pumpkin, and Pac-Man Halloween
Check out issue #617 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
gamedevjsweekly.com
November 1, 2025 at 8:16 PM
end3r.bsky.social
Issue #616 of Gamedev.js Weekly newsletter about AthenaEnv, 3D cyberpunk tunnel, and Solar Oasis is out - go check it!

gamedevjsweekly.com/616

#HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter
AthenaEnv, 3D cyberpunk tunnel, and Solar Oasis
Check out issue #616 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
gamedevjsweekly.com
October 24, 2025 at 9:23 PM
end3r.bsky.social
Issue #615 of Gamedev.js Weekly newsletter about Discord Activity with Wonderland Engine, JS13K-pack 2.0, and vortex is out - go check it!

gamedevjsweekly.com/615

#HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter #WonderlandEngine #WebXR #js13k
Discord Activity with Wonderland Engine, JS13K-pack 2.0, and vortex
Check out issue #615 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
gamedevjsweekly.com
October 18, 2025 at 2:26 PM
end3r.bsky.social
Update about #js13k t-shirts: from shipping the 2025 one, through getting the originals, to buying Retro and others from the shop.

js13kgames.com/2025/blog/ts...

#gamedev #gamedevjs #gamejam #swag #tshirt #JavaScript #HTML5 #indiegames
T-shirts galore: two originals for $13
If your entry ended up in the overall top100 results, then you’ve received an email today containing all the details about this year’s t-shirts and how to claim them, plus an offer to grab the limited...
js13kgames.com
October 17, 2025 at 5:14 PM
end3r.bsky.social
Overall #winners of #js13k 2025 were announced already, but what about categories? We had:

- Desktop
- Mobile
- Online
- WebXR
- Decentralized

Let's look at the best games in those in a thread ⤵️

#gamedev #gamedevjs #indiegames #gamejam #results #JavaScript #HTML5 #Desktop #Mobile #Online #WebXR
October 13, 2025 at 2:53 PM
end3r.bsky.social
Issue #614 of Gamedev.js Weekly newsletter about code golfing a tiny demo, js13kGames 2025 winners, and Duck Hunt clone is out - go check it!

gamedevjsweekly.com/614

#HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter #codegolf #js13k
Code golfing a tiny demo, js13kGames 2025 winners, and Duck Hunt clone
Check out issue #614 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
gamedevjsweekly.com
October 10, 2025 at 6:09 PM
end3r.bsky.social
Did you know Sticker Mule offers printing (on) rigid yard signs? I've decided to check how #js13k 2025 design would look like on one and it turned out great!

end3r.com/blog/rigid-y...

#gamedev #gamedevjs #swag #Badlucky #RigidYardSign #StickerMule
js13kGames 2025 rigid yard sign
Yes, you read that right: I wanted to try Sticker Mule's new rigid yard sign offer and they delivered - I'm now a proud owner of the js13kGames-branded sign without even having a yard!
end3r.com
October 10, 2025 at 3:41 PM
end3r.bsky.social
The #js13k 2025 #winners have been announced a few days ago already - let’s see the specific #criteria that comprise the overall #results, plus some extra #rankings about the voters in our community.

js13kgames.com/2025/blog/cr...

#gamedev #gamedevjs #indiegames #gamejam #HTML5 #JavaScript
Criteria rankings
The js13kGames 2025 winners have been announced a few days ago already, including all the category rankings. Let’s see the specific criteria that comprise the overall results. Plus some extra rankings...
js13kgames.com
October 10, 2025 at 2:47 PM
Reposted by Andrzej Mazur
glebv.bsky.social
The main takeaway from #js13k 2025: don't sink time into big, complex, self-contained concepts you don't have resources to finish properly. Start small but complete - then polish it as far as you can.

Next year's goal: get the game to playtests and tune the gameplay from there 🚀
October 7, 2025 at 12:16 AM
Reposted by Andrzej Mazur
frankforce.bsky.social
ZzFX sound was used by 6 of the top 10 JS13K games, including top 3 in audio, congrats! 🏆💤🚀 #js13k

ZzFX is a tiny open source tool that can play sound effects like magic without needing sound files. What would you like to see in ZZFX 2.0? 🔊🤔

killedbyapixel.github.io/ZzFX/
ZzFX - Zuper Zmall Zound Zynth
A tiny sound effects generator for games and websites!
killedbyapixel.github.io
October 6, 2025 at 3:21 PM
Reposted by Andrzej Mazur
boldbigflank.itch.io
Excited to be top ranked in #js13k 2025 in the WebXR category
The theme was Black Cat and my entry was a word puzzle set in a cat rave. Try them all out at js13kgames.com/2025/games
#gamedev #gamedevjs #gamejam #compo #competition #indiedev #indiegames #JavaScript #HTML5
Cover art of the 13 entries in the WebXR category
October 6, 2025 at 2:44 PM
Reposted by Andrzej Mazur
eliasku.bsky.social
We did it! 🎂 Our game Cat Survivors took 2nd place in three categories at #js13k 2025! 🏆 Huge thanks to everyone who played, rated, and shared feedback, to @end3r.bsky.social for another amazing jam!

Time to celebrate… with cake 🍰

#gamedev #cats #indiegame #indieGameDev #gamejam
October 6, 2025 at 11:31 AM
Reposted by Andrzej Mazur
frankforce.bsky.social
Here are 2 more #js13k games that used LittleJS and they are both great! ✌️😄 #littlejs

Miss Fortune by Daniel Jeffery #55 overall
js13kgames.com/2025/games/m...

KleptoKitty by @eoinmcg #22 overall, 6th place controls, congrats! 🚀
js13kgames.com/games/klepto...
KleptoKitty
A game in the js13kGames 2025 competition. Play it now, for free!
js13kgames.com
October 6, 2025 at 3:05 AM
Reposted by Andrzej Mazur
frankforce.bsky.social
My #JS13K game L1ttl3 Paws got 26th place! There were so many awesome games this year, and I really didn't get started until late in the contest. I'm just glad to be in the top 30! 😅👍 #gamedev #littlejs

js13kgames.com/games/l1ttl3...
L1ttl3 Paws
A game in the js13kGames 2025 competition. Play it now, for free!
js13kgames.com
October 5, 2025 at 2:57 AM
end3r.bsky.social
Enclave Games Monthly Report for September? Last month looked similar to August in terms of work - you guessed it, still all about #js13k 2025.

enclavegames.com/blog/monthly...

#EnclaveGames #MonthlyReport #gamedev #gamedevjs
Enclave Games Monthly Report: September 2025
September looked similar to August in terms of work - you guessed it, still js13kGames 2025.
enclavegames.com
October 6, 2025 at 6:06 PM
Reposted by Andrzej Mazur
fedetibaldo.com
My #js13k entry made it into the top 10! 9th overall, and 4th in innovation 🎉

Congrats to all those who participated. Maybe see you next year :)

If you haven't yet, you can try it out on the comp's website 👉 js13kgames.com/2025/games/k...

#gamedev #gamejam #indiedev
The overall winner of this year's edition, as displayed on the JS13kGames website. On the bottom left, in 9th position, my game (Kuro Neko Market) is highlighted
October 4, 2025 at 5:39 PM
Reposted by Andrzej Mazur
frankforce.bsky.social
Huge congrats to "Black Cat Squadron" for winning 5th place overall in #js13k using LittleJS Engine! It also works great on mobile devices, check it out! 🛩️💥🐈‍⬛ #littlejs

js13kgames.com/2025/games/b...
Black Cat Squadron
A game in the js13kGames 2025 competition. Play it now, for free!
js13kgames.com
October 4, 2025 at 4:17 PM
Reposted by Andrzej Mazur
glebv.bsky.social
I ranked 14th overall and an insane 4th in the Mobile category at #js13k 2025 with my game Catapoolt 🎯
👉 js13kgames.com/2025/games/c...

Not bad for a game made in just 2 days 😅
Huge thanks to everyone who helped, supported, and made this year’s compo so tough and awesome!
Catapoolt
A game in the js13kGames 2025 competition. Play it now, for free!
js13kgames.com
October 4, 2025 at 3:33 PM
Reposted by Andrzej Mazur
eliasku.bsky.social
The #js13k voting has ended - congrats to all participants! 🎉
Huge thanks to everyone who left feedback on Cat Survivors during the jam, it really means a lot. 🙏
Meanwhile, I'm adding gamepad support and building a fresh UI from scratch. 🕹✨

#screenshotsaturday #indiedev #gamedev #indiegamedev
October 4, 2025 at 12:26 PM
Reposted by Andrzej Mazur
randytayler.com
My browser-based VR game INSIDE CAT won 3rd place in #js13k... in the VR category. There were only 13 entrants in that category, but I'll take the bronze happily. My game fell apart near the end, and I almost didn't bother submitting it.

Thanks @end3r.bsky.social!

#gameDev #indiegames #hashtag
October 4, 2025 at 5:53 PM
end3r.bsky.social
Here are the WINNERS of the #JS13K 2025 competition, congratulations! 🎉

1. CLAWSTRIKE
2. Cat Survivors
3. Witchcat

Blog post: js13kgames.com/2025/blog/wi...

Full results: js13kgames.com#winners

#gamedev #gamedevjs #gamejam #indiedev #indiegames #JavaScript #HTML5
js13kGames 2025 winners
October 4, 2025 at 3:21 PM
end3r.bsky.social
Issue #613 of Gamedev.js Weekly newsletter about from Steam to floppy, LittleJS Game Jam 2025, and Messenger is out - go check it!

gamedevjsweekly.com/613

#HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter
From Steam to floppy, LittleJS Game Jam 2025, and Messenger
Check out issue #613 of Gamedev.js Weekly — the free, weekly newsletter about web game development.
gamedevjsweekly.com
October 3, 2025 at 5:05 PM