How I built a pixel art boss fight with pixelfx.

pixelfx is a free, open source library of 244 pixel art effects, and every one of them is a small piece of code. I used its engine to build the eye boss fight from my video. Here's how to get pixelfx running, the fight beat by beat with every effect it uses, the script itself to download and change, prompts for building your own with Claude Code, and the mistakes I hit so you don't.

November 2, 2026