You should now be able to set your own keybinds for most things in the in-game menu -> controls.
It should also save the keybinds, and re-load the previously saved keybinds when relaunching the game.

The only non-rebindable keybinds now should be:
Left click (action, shooting, etc.)
Escape (menu, quit, generic escape stuff)
Spacebar (jump)
T (talk to npcs)
Q-E (drop-pickup weapons)
F (various interactions with the world)
Maybe some other generic ones

I will eventually make those rebindable too, especially for possible controller support, but for now every other keybind should be rebindable in that menu mentioned at the beginning of this post.

My apologies for making this a feature so late lol, it actually ended up being a lot easier than I thought it would with Unity's default Input System.

IF you run into problems with it, as I have only tested it myself so far and found no issues but ya never know, then old_stable_3 game version is the fallback version. Also let me know of any bugs with it.