sfx and mux and window size on desktop client

What we are heading for:

A “complete” desktop client, which includes the following:

1. Volume controls for SFX and MUX. (“done”)
2. Some music. No, it won’t be good yet. (“done”)
3. The ability to change the window size. (“done”)
4. The ability to toggle full screen.
5. The ability to edit keybinds.
6. The ability to save and load the game.

At this point, I have the first three features in an MVP sort of state. They are janky to use, but usable none-the-less.

The people have spoken: this will be a Steam Game.

Which means several things:

1. how much more developed does the web/jam version get updated here on itch?
2. what features are necessary for the steam demo version?
3. what features are necessary to ship the damn thing?