Hi Hacker News,

I present to you "Lunchtime Broadcast", a walkaround-game (in the vein of Homestuck) where the mechanics are primarily walking your character around and talking to people in order to advance the plot. It's set in a fictional Korean high school, where you learn part of the vocabulary used in the webtoon "Sora & Haena!".

I am a big believer in comprehensible input, and so I had Claude come up with its own original story that teaches vocab from the webtoon's first 4 episodes, but is targeted to my intermediate-ish level. The hope is that after playing through "Lunchtime Broadcast", reading the webtoon should be much easier for me.

Notable Features :

- Built for phones but playable on desktop

- Every word in the dialogue is tappable and gives a definition Claude wrote in simpler Korean. English definitions are hidden behind a "?" icon

- There is a dictionary that shows words by how often or how recently you have tapped them

- Words that have been taught come up as multiple choice cloze review questions when you talk to characters. Many scenes have unique questions that use and quiz the taught vocabulary, even vocab from previous chapters

- As players progress, they unlock some culture and grammar notes (which I had Claude generate and then fact-check against online sources)

The development process (ongoing) involves me having Claude Opus 5.5 and GPT 6.1 Sol play through the chapters multiple times as a player in polishing passes, as well as feedback from me as I played through. I have currently only played completely through chapters 1 and 2, but there are 4 game chapters. The Korean lines were generated by Claude, not by native speakers, so there may be mistakes.

Repo: https://github.com/Stan-Stani/jeomsim-bangsong

Live Game: https://stan-stani.github.io/jeomsim-bangsong/

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