April 13th - 26th 2021

Gamedev.js Jam 2021:
Let's make HTML5 games!

Join the Jam!

Main Partners

NEAR Protocol Protocol Labs


Paras marketplace OP Games


The Jam runs for 13 days: between April 13th and 26th 2021.


A globally available online event hosted at Itch.io.


Have fun building games and win some prizes at the same time!

Gamedev.js Jam celebrates HTML5 games - build a Web game within 13 days of the jam on a given theme (revealed at the start), it runs between April 13th, 1 PM CET and April 26th, 1 PM CET 2021. Also, there are prizes!

Join the Jam!

Theme for this year's jam will be announced on April 13th. Remember that your entry will be judged based on how well you implement the theme, but you can interpret it however you like.

Join us no matter your skill level - this game jam is a perfect opportunity to create your very first game, or build a prototype for your next commercial hit. Almost two weeks of development time should be more than enough!

You can use #gamedevjs hashtag on Twitter to share your progress, ask for feedback, see what others are building and hopefully help them out if they need it. There's also a Discord server for direct communication!


There are two categories in the Jam: Web Monetization and Decentralized. Both are optional, and the entries submitted to those categories will be judged separately by the panels of experts.

Take part in the Web Monetization category if you'd like to implement Web Monetization API in your jam submission.

Take part in the Decentralized category if you'd like to implement any of the decentralized technologies in your jam submission. Those could be from NEAR Protocol or Protocol Labs (IPFS, Filecoin, etc) if you'd also like to complete any of the challenges, or it can be something else entirely.


Challenges are part of the Decentralized category - there are three to pick from, and you are free to take on any of them, or all at once.

Each and every challenge offers unique prizes, so make sure to check those out.


There are three levels of prizes: for all the entries, for specific categories, and for challenges.

Overall prizes

Those prizes will be given to the best entries of the overall ranking on Itch.io:

Web Monetization category prizes

Those prizes will be given to the best entries selected by a panel of experts:

  • 1st place: $300 cash
  • 2nd place: $250 cash
  • 3rd place: $200 cash
  • 4th place: $150 cash
  • 5th place: $100 cash

Every entry can win only one cash prize and one Coil membership per team. Cash is wired through PayPal or bank wire, taxes are paid by the winners.

Decentralized category prizes

Those prizes (including challenges) will be given to the best entries selected by a panel of experts:

  • 1st-10th places: Ledger Nano S
NEAR Protocol challenge prizes
  • 1st place: 225 NEAR (~$1500)
  • 2nd place: 175 NEAR
  • 3rd place: 125 NEAR
  • 4th place: 75 NEAR
  • 5th place: 25 NEAR
  • 6th-10th places: 15 NEAR (~$100)
Protocol Labs challenge prizes
  • 1st place: 8 FIL (~$1500)
  • 2nd place: 6 FIL
  • 3rd place: 4 FIL
  • 4th place: 2 FIL
  • 5th place: 1 FIL
  • 6th-10th places: 0,6 FIL (~$100)
Paras challenge prize
  • 1st place: $500 cash

Winners will also be promoted via our Twitter, on the gamedevjs.com website, and in the Gamedev.js Weekly newsletter.


Two panels of experts for Web Monetization and Decentralized category entries.

Web Monetization experts

Bjorn Ritzl
@bjornritzl | defold.com
Product Owner and Board Member of the Defold Foundation, overseeing development of the free and source available Defold game engine. Worked with mobile game development since before the smart phones. Loves old school games and roguelike games (hosts the Rogue Basin wiki). Strong believer in the power of open source development with more than 150 open source projects on GitHub.

Ania Kubów
@ania_kubow | youtube.com/aniakubow
Ania is a Software Developer and YouTuber who loves to teach JavaScript and React by building all sorts of retro online games.

Nathan Lie
@feraltc | coil.com
Nathan is a Software Engineer at Coil who considers himself a gamer first and an engineer second. He's been working with and on applications using Web Monetization for the past year, and is eager to see the intersections between Web Monetization and game design this year!

Ewa Mazur
@mypoint13k | mypoint.pl
Graphic Designer, mom and wife. Open source and mobile games enthusiast. Making game designs for Enclave Games, t-shirt designs for js13kGames, writing inspirational posts and tutorials on Tutsy and making cool things for children at MAMAdesigner. Loves taking photos, drawing icons, and spending time with her family.

  • To Be Announced
Decentralized experts
  • To Be Announced
  • To Be Announced
  • To Be Announced
  • To Be Announced

Experts will judge the entries through a voting period between April 26th and May 3rd.

Submitting your entry

Submit an HTML5 game between April 13th and 26th 2021 through the Itch.io platform. It can be a solo submission, or a team effort. You can even submit more than one entry if you want to.

Voting on entries

Voting will be open to all who submitted a game, and will happen via the Itch.io platform for a week right after the submission period ends - between April 26th and May 3rd.

Games will be voted on based on a given criteria: Innovation, Theme, Gameplay, Graphics, and Audio. The Overall ranking will be based on the summary of those.

Following the rules

The short version is: anything that can run on the Web in a browser without extra plugins is considered a valid jam entry. It's highly advised you create new content for the jam - submitting your old demos or already finished projects makes no sense.

If you have any questions or concerns please ask at the Community forums or join our Discord server.