Nikki, Sarah, Adam, Lane, Shashi, and Nick on the set of Web Dev Challenge. the text reads, "Web Dev Challenge community hackathon, S2.E2 Multi-Device Game, presented by Temporal and CodeTV"

Photos: Jason Hill

The prompt: Build a game that’s played on at least 2 devices.

Single player, multiplayer, cooperative, competitive, or something totally different — your challenge is to come up with something fun that is played across at least two devices. Temporal’s workflow tools will allow you to manage sending information between devices dependably.

Your game could be something like Jackbox, where a tv is the “game board” and each player’s phone is how they interact with it on their turn. You could make a game that uses phone APIs like the camera or gyroscope. Or you can implement a simple word game like the New York Times connection puzzles, but with the twist that it’s designed to be solved collaboratively, and a session can persist beyond the players closing the web app.

Get creative and have fun with it!

Apps must use Temporal as part of the build.

Introduction to Temporal + devs discuss their ideas

In the kickoff call for this hackathon, Alex Garnett from Temporal gives an overview of how Temporal works, including a live coded demo, and answers questions from developers.

Kickoff call with Alex Garnett from Temporal, recorded May 2

Make new connections and get expert guidance

We’ve set up a dedicated channel in the CodeTV Discord called #builder-chat for brainstorming, sharing ideas, and keeping each other accountable.

The first 5 devs to submit a qualifying app get their choice of gear

The first 5 qualifying apps submitted will receive an item of their choice, up to $150 value, from one of the following sites:

Watch the episode for inspiration

See how Sarah and Nikki, Shashi and Nick, and Adam and Lane tackled the challenge in the latest episode of Web Dev Challenge to jumpstart your own creativity.

The rules and how to submit

If you want to play along, here’s how:

  1. Team up with a friend or work on your onw
  2. Build a web app that meets the challenge
  3. Spend 30 minutes¹ planning your app
  4. Spend 4 hours¹ building your app
  5. Use Temporal to build your web app
  6. Publish the source code as a public GitHub repo
  7. Publish the web app to a public URL
  8. Submit your web app by 11:59 pm Pacific on Monday, May 12, 2025

Submit your web app

Happy building! Let’s have some fun.