Godot Version
4.2
Question
How do I switch the gravity in my Puzzle platformer?
Go to the project settings and locate Physics/2D/Default Gravity or simply search for gravity, right-click and select “Copy property path”, then write the code as follows:
# "physics/2d/default_gravity" is what you have copied
ProjectSettings.set_setting("physics/2d/default_gravity", -980)
Or you can change the gravity direction:
# Set it to "Vector2(0, 1)" will make gravity to the right
ProjectSettings.set_setting("physics/2d/default_gravity_vector", Vector2(0, 1))
Basically, you copy the setting’s path and use it in the ProjectSettings.set_setting() method. This is how you change any setting in the code.
Thank you. Please tell me the other directions, It would be really helpful. 
Since Vector2 has an x and a y, and positive x is pointing right, and positive y is pointing down, you can combine these together to make any direction.
For example, we want gravity to the left, then we need x set to -1, and 0 for y, the result is Vector2(-1, 0). Be careful about this, for this changes the direction but also the gravity scale.
And I just noticed in the documentation that how to change physics/2d/default_gravity_vector at runtime.
This is the following section:
Note: This property is only read when the project starts. To change the default gravity vector at runtime, use the following code sample:
# Set the default gravity direction to `Vector2(0, 1)`. PhysicsServer2D.area_set_param(get_viewport().find_world_2d().space, PhysicsServer2D.AREA_PARAM_GRAVITY_VECTOR, Vector2.DOWN)
This reminds us to be careful about descriptions in the docs instead of always guessing around and lost.
does this mean that if I change the gravity direction, and its stronger than I expected, will I be able to use decimals?