Step 2: Making the player rotate from the centre
At the moment the player rotates around the top left corner of itself, this is because game objects rotate around their anchor point, and the anchor point is in the top-left corner of an object by default. We'll shift the anchor point when the player is created, and we'll set the x anchor point (horizontal) to half of the player's width, and the y anchor point (vertical) to half of the player's height. This will put the anchor point right in the centre of the player object.
Go back to editing the script, and and grab these blocks: "When created" (from Events), "Set anchor point x of myself" (from Transform), "Set anchor point y of myself" (from Transform), two "_÷_" blocks ("_+_" from Operators), "actual width of myself" (from Transform), "actual height of myself" (from Transform), and two "2" number blocks ("0" from Operators).
Now play your game to see rotation working much better.