I have reviewed the webchat transcript from "nuke-devchat.txt". The missing
gaps in the final single-page HTML prototype occurred because the chat
interface stripped out the line breaks and backticks (  ) needed for
JavaScript template literals during the copy-paste process[span_1](start_span)[
span_1](end_span). This squashed the GameEngine` object into a single broken
string.  
Here is the fully repaired, standalone HTML file with the reconstructed
formatting, functional UI, and the complete AI simulation loop intact. Save
this as an .html file and open it in your browser.

https://share.gemini.google/815ikXtCBT4L