Updated main.lua with physics

main.lua

function love.load()
  
  -- A meter will be 64px
  love.physics.setMeter(64) 
  
  -- Set the X gravity, Y gravity, and if objects can sleep
  world = love.physics.newWorld( 0, 0, true )
  
  -- Create a table table
  player = {}
  -- Create a width (for later drawing)
  player.width = 20
  -- Create a height (for later drawing)
  player.height = 20
  
  -- Create a new physics body in the world and make it "dynamic"
  -- The new coordinates will be where the 'body' is going forward.
  -- Any time (like for drawing) the x,y is neededm use getX() and getY()
  player.body = love.physics.newBody( world, 100, 100, "dynamic" )
  
  -- Make a rectangle shape with: 
  --  Starting at 100, 100 (player.body:getX() and player.body:getY() )
  --  a width of player.width
  --  a height of player.height
  player.shape = love.physics.newRectangleShape(player.body:getX(), player.body:getY(), player.width, player.height) 
  
  -- Attach the shape to the body
  player.fixture = love.physics.newFixture(player.body, player.shape, 1);
  
end

function love.update(dt)
  
  -- Feed the world the current delta time (dt)
  world:update(dt)
  
  if love.keyboard.isDown("up") then
    player.body:applyForce(0, -40)
  end
  
  if love.keyboard.isDown("down") then
    player.body:applyForce(0, 40)
  end
  
  if love.keyboard.isDown("left") then
    player.body:applyForce(-40, 0)
  end
  
  if love.keyboard.isDown("right") then
    player.body:applyForce(40, 0)
  end
  
end

function love.draw()
  
  -- Draw the rectangle using:
  --  "fill" (fill in the shape)
  --  Using the X of player.body
  --  Using the Y of player.body
  --  Using the player.width
  --  Using the player.height
  love.graphics.rectangle("fill", player.body:getX(), player.body:getY(), player.width, player.height )
  
end