A pong game written in Ruby

pong

require "curses"
include Curses
include Math
def pong 
	# ALL THIS NEEDS TO BE DISPLAYED SOMEHOW
	# show “CONTROL THE PADDLE WITH THE W AND S KEYS” in the middle of the board for a few seconds
	score = 0
	scof = 1.0
	paddle = 50.0 # max y-coordinate/2, making the board 100x100 for now
	#paddle is 10 long
	ball = {"x" => (rand(50.0) + 50.0), "y" => rand(100.0), "dir" => rand * 2.0 * PI}
	# remember to make everything floats or 1/2 will equal 0 and the world will end
	Curses::timeout = 50
	while ball["x"] != 0 
		#i don’t actually need this for anything but it took a long time to type so i’m saving it just in case
		#(ball[“x”] > 0) && (ball[“x”] < 100) && (ball[“y”] > 0) && (ball[“y”] < 100)
		ball["y"] -= sin(ball["dir"]) * scof * 0.05
		ball["x"] -= cos(ball["dir"]) * scof * 0.05
		a = Curses::getch
		if a == ("w" || "W")
			paddle += 1
		elsif a == ("s" || "S")
			paddle -= 1
		end
		newdir = lambda { |x| ball["dir"] + (2 * (x - ball["dir"])) + (rand * 0.3) }
		if ball["y"] <= 0
			ball ["dir"] = newdir[PI * 0.5]
		elsif ball["y"] >= 100
			ball["dir"] = newdir[PI * 1.5]
		elsif ball["x"] >= 100
			ball["dir"] = newdir[PI * 1.0]
		elsif ball["x"] <= 1
			if (ball["y"] < (paddle + 5.0)) && (ball["y"] > (paddle - 5.0))
				ball["dir"] = newdir[0]
				scof += 0.1
				score += 1 
				#alternately, score and speed coefficient could increment with time
			else
				ball["x"] = 0
			end
		end
	end
	# replace board with “YOU LOSE”, pause for a second, then add “YOUR SCORE WAS #{score}”, pause again, then “DO YOU WANT TO PLAY AGAIN (Y/N)?”
	b = getch
	if b == ("y" || "Y")
		pong
	end
end