Kieran Smith

@DaraChaww @buildinpublic All of the assets are sourced from sites like itch.io and poly.pizza

@imkieransmith @buildinpublic are the models imported or made with code?

What are you working on this week?

@rfitzpatrick_io @buildinpublic Thanks Ryan 😄

@imkieransmith @buildinpublic very smooth, looking like a great start!

@cheugs_ You're welcome 😄

@imkieransmith excellent write up, thank you!

Longer post on how I started the game for anyone else wanting to join in #vibejam I use Github Copilot and ChatGPT Codex for coding, both as extensions in VSCode. This is my setup for coding in general. You can use whatever form of AI you want, it should be able to edit files directly though, so Claude Code, Opencode, etc, not the ChatGPT web interface. I literally started with an empty folder and asked GPT 5.4 to set up Three.js (see screenshot). After that it's just a conversation. Ask it to implement things in baby steps, one thing at a time. You can't say "build me titanfall, make no mistakes", but you can say "add fps movement", "now add jumping", "now let me double jump". I can code and have dabbled with game design in the past, so how I approach things might be more refined, but I've never used Three.js before. I have absolutely no idea how any of the codebase here works. But that's the point of vibecoding a game lol. I use GPT 5.4 as my workhorse, implementing features, making changes etc. I find it works fast and does a good job. When I feel like enough has been implemented, or if I think GPT 5.4 isn't getting things right, I swap over to Opus 4.6. I ask it to do a full project review, refactor for performance, and then implement specific changes/extensions to the work of GPT 5.4. I find Opus 4.6 a lot slower, but it does a fantastic job at understanding what you want if your message isn't specific enough. The models seem to work differently for everyone; yesterday on Twitter I had a conversation with someone who uses these same models the opposite way around lol. All models and animations come from sites like itch.io and poly.pizza, I use the free packs (attribute as necessary according to the license). I drop the downloaded assets into an assets folder of the project and ask AI to wire everything up. After the basic functionality for something is wired up, I like to spend time obsessing about details, even if they'll eventually be changed. Something has to feel right before I'll move on. Eg, the video I shared of a titan landing, I literally spent hours iterating on how that felt. If unsure, ask it for best practices and to produce a plan before actioning changes. The only codebase changes I make to this project are tweaking global constants at the top of the file. Anything that can be tweaked; movement speed, jump strength, player height, etc, is set as a const. And I rarely only change these manually. Drop any questions below, happy to help any way I can 😄

@turbo_xo_ Thanks for the heads up, still need to do some work on mobile but that will come when I've finalised the HUD and game functionality. Wanted to get something in so people can demo it on their phones though.

@imkieransmith The fire button on mobile doesn’t work, you have to use auto shoot by overlapping crosshair with hitbox, nobody gets this right

I spent day 2 of #vibejam improving movement and collisions. I also played about with a quick map editor, lighting, shadows, and a first pass at mobile controls. You can check it out here: vibejam2026.kieransmith.me

@johnurbank I haven't had Claude do any modelling work, I think I should explore that though. All of the assets come from itch.io or poly.pizza

@imkieransmith Did Claude do your models? Still trying to figure that part out

It's not a Titanfall inspired game without the titans! I spent a lot of time on day 3 of #vibejam making this feel epic. Next up is making you feel like you're in a titan.

@turbo_xo_ Thanks 😄 No Blender, that sounds like far too much work 😂 models found online and then a lot of prompting and tweaking!

@imkieransmith How the FUCK did you do this?! This is undress, did you use blender?

@Infinite79Mr Thanks 😄 have a look on sites like itch.io and poly.pizza for assets. I downloaded them, put them into a folder in the codebase, and asked Claude to make it appear lol. Fine tuning and tweaking from there.

@imkieransmith Looks great. Where did you get the models from and how hard was it to bring them into the "engine"?

@levelsio Thank you! Sound incoming soon!

@imkieransmith So good, we need sound!!!!

@thijsmakes Thank you 😄

@imkieransmith Sick landing of that titan haha

I've updated the demo link, call in your own titans here - vibejam2026.kieransmith.me

@levelsio @cursor_ai @boltdotnew @heyglif Thanks for sharing my video 😄 and for organising the game jam, I’m having a blast!

🕹️ Day 3 of the @cursor_ai #vibejam Proudly sponsored by @cursor_ai + @boltdotnew + @heyglif (Glif joined as a new sponsor and I'll tell you more tomorrow about how they will help your games!) It took a bit but things are finally starting to heat up! Here's some amazing games I saw today (in the videos): - unnamed by @DannyLimanseta - Risefall RPG by @vicki_petrovaa - Vibe Theft Auto by @oldfeet - unnamed by @imkieransmith Reply in this thread with updates on your current games to share your progress! I'll keep reposting all your updates during the Vibe Jam. The quality looks a lot higher than last year, AI models have come a long way and it's easier to build something that looks good and is playable! But you still need creativity and I see a lot of creative things in my timeline: x.com/search?q=%23vi… Wanna participate? Can submit any time before May 1, so if you want to start tomorrow that's fine too! There's $35,000 in prizes you can win, see thread below for more info!

@egor4042007 Three.js for the game, no other libraries. The map editor is vanilla HTML/CSS/JS. For things like this I like to tell the AI to keep everything in a single HTML file, keeps it entirely self contained and makes future edits easier.

@imkieransmith Is it a library or u made map editor by urself?

@MartinBlampied @tristanbob @threejs I’m using GPT-5.4 in Codex (VScode extension), and GitHub Copilot for Opus 4.6. I’ve actually found it to be the opposite to you! Opus 4.6 does a lot of thinking, so I like to save it for refining the work GPT does.

@imkieransmith @tristanbob @threejs Have you tried swapping these? I've found opus to be the better/quicker workhorse, and GPT better for spotting its mistakes

Which model makes the best @threejs games? - Gemini 3.1 Pro - Claude Opus 4.6 - GPT-5.4

@egor4042007 I posted a screenshot of the map editor, I can “draw” buildings on a grid. That is converted to a map JS file of 3D positions and the building models rendered. Other than that I have no idea, I didn’t build any of it 😂

@imkieransmith Btw, how u made this map?

@duckocancode Great minds think alike 😂 Yours is looking great, love the level design

@imkieransmith LMAO are we really building the same game hahahaha

@oldfeet I recognise those assets 🤔😂

The city the agents built is a bit wonky, but it did a great job building the system We have a nice world/tile edit mode too, so we can make a real city later Building games with AI goes a lot smoother when loading some game assets into the project before it gets going, so it has something to work with #vibejam