LMAO – Temu League of Legends, Built with Opus 4.8

Name: LMAO – Temu League of Legends, Built with Opus 4.8
Availability: InStock
Author: jonnyasmar

by jonnyasmar·Jun 2, 2026·4 points·4 comments

Visit Project View on HN

AI Analysis

●●SolidCrowd PleaserShip It

Full MOBA in your browser when most competitors require downloads and launchers.

Strengths

•Server-authoritative architecture running entirely client-side is technically non-trivial.
•18 original champions with abilities, items, and jungle objectives actually implemented.
•Room codes enable instant multiplayer without accounts or installation friction.

Weaknesses

•Derivative by design—'Temu LoL' acknowledges it's not competing with League directly.
•Weekend project status means long-term balance, anti-cheat, and scaling are unproven.

Post Description

Fun weekend project just to test out 4.8 against a pretty vanilla setup.

Started out with a simple prompt, "build a temu league of legends, web-only with online, room-based multiplayer".

It built it... fully functional in one shot! Then I went kinda ham and started iterating on every aspect little by little. I made it spin up subagents to each focus on designing a character. Spun up subagents to focus on designing abilities and their SFX/VFX. Did a few passes over the map, mobs, minions, etc.

Then I put Ultracode Workflows to task and, across a handful of prompts, had it optimize performance, balance, and a variety of other things. Workflows is insane btw...

I also used /goal pretty heavily as well. I'd sit and play and make note of like 10-15 tweaks, bug fixes, etc at a time and just let it go to town.

4.8 is a one shot machine... 5.5 ain't doin this...

Anyways, figured I'd share. Happy to answer any questions in the comments!

Try it out solo (with bots) or with friends! https://lmaomoba.com

Stack - Web: React/TypeScript - Game: Canvas - Server: PartyKit - Harness: Claude Code - Model: Opus 4.8 - IDE: atrium (getatrium.dev)