Set most things to private throughout scripts
Walls that aren't slideable still set player animation var on_wall = True
I don't know how I feel about this, but 'stm.state.name == "Wallslide"' will get the job done. What it does is that it checks what internal state we are in, I don't think that the animation system…
Reading a cameras global_position somehow changes the output of get_screen_center_position()
Godot hover documentation sometimes don't work
If there is lacking documenation about somethings specific, open a separate issue
Document scene transitions (README)
Cameras: take into consideration camera limits and actual camera position when switching cameras