Maybe consider my Elixir package:
With a simple and extensible DSL you can write any story and easily translate it using po files. In recent release there is lots of extra code for a session management and so on. This way you can easily write a simple game or presentation by generating a new Phoenix (web framework) based project, adding your LiveView pages and of course using the DSL and optionally translating the content.
I have even created a simple project to demonstrate how a video talk have been transformed into a presentation. You can use for example a Rust NIF to do the GUI or use wxWidgets bindings for Erlang language or even Scenic for embedded devices.
Working on HTML-based game at the very start should be simplest option and it’s also worth to mention that we have a LiveViewNative project. Let me know how that sounds for you.