Anyone know how to manipulate gravity on roblox?

No, I don't have any work to show since I don't know where to start. All I'm asking is for a source that can possibly help me on changing the direction of gravity.

Im not sure if this is what you want but just incase. You can do workspace.Gravity. so if you wanted to change the gravity when you hit a block you can do:

local Part = Instance.new("Part")

Part.Touched:Connect(function()
	workspace.Gravity = 15 -- this will make it feel like you are in space!
end)

If you want to change the direction of gravity then i'd recommend setting gravity to 0 and applying a vector force to the players in your wanted direction