Thank you!
The game was created using vanilla HTML, CSS & JavaScript, with VS Code as my code editor. I made a conscious decision not to use any external JavaScript libraries or frameworks to ensure it works offline from a single file and has no dependencies.
If people are interested in creating mods, then I could add a dedicated section to the Extras menu. This could allow players to import mod files and toggle which ones they wish to activate/deactivate. I would probably add this once the game nears completion to prevent big new updates from breaking mods.
Until then, if anyone has anything they'd like added or changed, please post your suggestions in these comments so I can add them to my to-do list!