This morning, April 7, 2026 (early morning JST), I have released the prototype of UNDEFINED: ILS for free on itch.io — a minimalist puzzle adventure where a local LLM evaluates how players respond to visual incompleteness and contradictions. Players are shown "missing," "contradictory," or "unfinished" visual structures and respond by drawing lines directly on the screen. The AI immediately judges the response with "PROBLEM WAS SOLVED" or "PROBLEM WAS NOT SOLVED" and explains its reasoning in natural language. The way players draw, retry, or skip accumulates as behavioral patterns that influence the game's outcome. This type of interactive experience only became feasible in 2026 due to significant improvements in local LLM image recognition. The prototype includes 10 selected problems out of 100 (ending not yet implemented). I'm releasing it for free to gather wide feedback ahead of the full Steam version. # Key Features Minimalist input: Draw one line — complete gaps, resolve contradictions, redefine rules, or reject the problem. Real-time AI judgment with natural language explanations — it feels like your thinking is being calmly observed. No hints, timers, or limits — the challenge lies in choosing your "attitude" toward ambiguity. Player behavior patterns (not just right/wrong answers) shape the narrative. # Example Problems Complete the unfinished equation "1 + 1 =" or leave it as is? Fill a missing face, highlight the gap, or reinterpret the pattern entirely? In a blocked road scenario, draw a path, change the rules, or reject the premise? # Specs Title : UNDEFINED: ILS Genre : Puzzle Adventure / Single Player Planned Release Date : Autumn 2026 Languages : English, Japanese, Chinese（Simplified / Traditional), Korean Download the Free Prototype (Available Now) : https://kamekichi.itch.io/undefined-ils Steam Store Page : https://store.steampowered.com/app/4481900 Play Demo Movie : https://youtu.be/VQGQtjyYXv4 System Requirements : Windows 10/11 – VRAM 6GB+ GPU recommended