Absolute Zero is a puzzle game built on a single mechanic: heat transfer.
Every element on the board has a temperature. Move a cold object near a hot one — energy flows. The goal is always to reach absolute zero, but the path is never obvious.
The design constraint was no UI numbers. Temperature is communicated entirely through color and particle density. Players learn the system by feel, not by reading.
This was an exercise in teaching through environment, not instruction. The hardest puzzles were designed last, after watching enough players fail in predictable ways. Each failure mode became a puzzle that teaches the mechanic that caused it.