Flappy is a viral game from 2013. The game is very simple, but it is very addictive. The game is about a bird that has to fly through pipes without hitting them.
I have tested several AI tools to generate the code for this game. This is the prompt I used:
Create a plan for developing a Flappy Bird clone using HTML, CSS and JavaScript.
Last time I worked on this project when gpt-5 was released, back then codex app was not even a thing. Composer 1 was not even released, and we didn't hit the inflection point with Opus 4.5, when I started this project 11 months ago, My understanding of AI models, agent harness, agentic coding was minimal. Back then Claude code was just getting started and started the cli based coding agent revolution. Back then we were getting and IDE every single day, now a days we get agent orchestrator. I want to organize this project based on model instead of IDES. And I will be using the agent app for that model if it's available. Otherwise I will use the CLI comes with it. To make things interesting I will test few models with different harnesses like Pi.dev and Opencode. The results that were produced with no model information will be moved to archive.
Another thing, back then when I tested it I was using GitHub copilot and now it's dead due to it's insane pricing change. So I will not be testing it.
Date: June 3, 2026