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js13kGames

Js13kGames is a JavaScript coding competition for HTML5 Game Developers. The fun part of the compo is the file size limit set to 13 kilobytes. It runs between August 13th and September 13th, online since 2012.

js13kGames 2025 voting is open!

2 min readSep 14, 2025

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We’ve wrapped the 14th yearly edition of the js13kGames competition with 197 entries - thank you all so much for making so many tiny web games! Now is the time to start voting and picking the winners!

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Voting runs online for three weeks between September 14th and October 4th, with the winners being announced on October 5th. If you submitted your entry this year, you can now judge other people’s games and provide them with a vote. This means playing the games, scoring them with the five star rating based on the criteria: Theme, Innovation, Gameplay, Graphics, Audio, and Controls, plus providing written feedback of what you think went well and what could’ve been improved.

Updated criteria

Keep in mind we’ve updated the voting criteria a bit: Controls are judged separately for Desktop, Mobile, and WebXR now. You won’t be able to give an entry without audio any stars as it will automatically get zero points for that. You can also vote on the games in the Online and Decentralized categories as an addition to the dedicated judges.

Write good feedback

Try to write the feedback in a way you would like to receive it about your own game. Our panel of experts will play your games and provide their feedback too. Plus, anyone can log into the website and leave their comments though, so feel free to encourage friends and coworkers to join as well.

To cast your vote you need to log in with your GitHub account, visit an entry’s page, play it, and then leave your rating along with the written feedback.

Dynamic listing

The order of the games throughout the voting period will change - right now at the top are the ones submitted first to promote sending the games early. In the next few days the order will change to random, and a few days before the deadline it will switch to showing the ones with least votes at the top.

Post Mortems

While you vote on entries, and the memory of your own game is still fresh, you can write a Post Mortem: what was good and went well, what you struggled with when building your entry, and what you are proud of - it’s so valuable to read the inside stories from past years!

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js13kGames
js13kGames

Published in js13kGames

Js13kGames is a JavaScript coding competition for HTML5 Game Developers. The fun part of the compo is the file size limit set to 13 kilobytes. It runs between August 13th and September 13th, online since 2012.

Andrzej Mazur
Andrzej Mazur

Written by Andrzej Mazur

HTML5 Game Developer, Enclave Games indie studio founder, js13kGames competition creator and Gamedev.js Weekly newsletter publisher.

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