Thank you for clarifying! My current plans are to do some minor improvements, and see how it turns out in the Godot jam. If it gets much reception I'll maybe make a bigger game out of it. After all it's still a smaller hobby project I am working on next to my Master of Computer Science and I can't spend full time on it. :)
Coolio! Looking forward in case you decide to take things further! By the way the plugin to simulate different acoustics (such as the sound coming from an actual phone or walkie-talkie), check "Place It" from Soundly. You can run the plugin in your DAW and apply the sound effects.
https://getsoundly.com/tools/