Switch statements but in ruby

app.rb

@@ -20,8 +20,8 @@ class Window < Gosu::Window
 		@physobjs = physobjs
 		@planets = planets
 
-		@font = Gosu::Font.new(self, "monospace", 18)
-		@font2 = Gosu::Font.new(self, "monospace", 20)
+		@font = Gosu::Font.new(self, MAIN_FONT, 18)
+		@font2 = Gosu::Font.new(self, MAIN_FONT, 20)
 
 		@fonts = {
 			normal: @font,

config.rb

@@ -2,4 +2,12 @@
 MAIN_FONT = "monospace"
 
 # Keybinds
-BIND_PAUSE = Gosu::KbEscape
+	# General
+	BIND_PAUSE = Gosu::KbEscape
+
+	# Player Controlls
+	BIND_TURN_LEFT = Gosu::KbLeft
+	BIND_TURN_RIGHT = Gosu::KbRight
+	BIND_INCREASE_THRUST = Gosu::KbUp
+	BIND_DECREASE_THRUST = Gosu::KbDown
+	BIND_TOGGLE_ENGINE = Gosu::KbSpace

controller.rb

@@ -28,24 +28,22 @@ class Player < PhysCube
 	end
 
 	def button_down(id)
-		if( id == Gosu::KbSpace ) then
+		case id
+
+		when BIND_TOGGLE_ENGINE
 			@engine = !@engine
-		end
 
-		if( id == Gosu::KbLeft ) then
+		when BIND_TURN_LEFT
 			self.angle -= 20
-		end
 
-		if( id == Gosu::KbRight ) then
+		when BIND_TURN_RIGHT
 			self.angle += 20	
-		end
 
-		if( id == Gosu::KbUp ) then
+		when BIND_INCREASE_THRUST
 			self.thrust += 0.0005
 			self.thrust = self.thrust.round(5)
-		end
 
-		if( id == Gosu::KbDown ) then
+		when BIND_DECREASE_THRUST
 			self.thrust -= 0.0005
 			self.thrust = self.thrust.round(5)
 		end