Hello! You're right in that the additional languages are only available in the Steam version right now. If you can reach out to us here, we can help you out on that front...
The separate volume sliders should solve your volume issue -- you can drop the music vol as you need.
Key-rebinding isn't an option though sadly. Wasn't within my scope to achieve this; apologies. One for next time!
Viewing post in Headspun: Dazed Edition comments
That was a fast reply :)
There are tools with which I can implement key-rebinding myself .. so that's not a big issue .. just a bit unfortunate since the game seems to be quite nice. The missing languages is a different thing though ... is it difficult to bring the Steam build to itch.io DRM-free? DRM-free has become quite a thing today so that would be nice. I guess right now using the Steam version would be the only way to get these files?
How do I "reach out" here? I am quite new to itch.io (usually I am a GOG user).