[sacckey]

Thank you!!!

Crystal instead of Opal? I didn't consider using Crystal because I specifically wanted to implement this in Ruby! As for using Opal instead of ruby.wasm for the web version, I haven't tried that approach yet, but it sounds like an intriguing possibility.

[Minor49er]

Crystal is basically compiled Ruby

The queuing system RabbitMQ was ported over to Crystal in an afternoon with minimal changes, though I don't know if the result of that experiment resulted in anything new. It was cool to see the founders of Rabbit showing that it was possible. It might be worth trying for the emulator