--- CptnRuby.rb	2007-08-31 21:53:16.859375000 -0700
+++ CptnNuby.rb	2007-08-31 22:30:47.687500000 -0700
@@ -1,3 +1,12 @@
+#
+# NOTE:
+#   This is the CptnRuby demo from Gosu-0.7.4, slightly
+#   modified to allow free up/down movement, instead of
+#   jumping & gravity.
+#
+#   Get Gosu at: http://code.google.com/p/gosu/
+#
+
 begin
   # In case you use Gosu via RubyGems.
   require 'rubygems'
@@ -34,7 +43,7 @@
 require 'gosu'
 include Gosu
 
-module CptnRuby
+module CptnNuby
 
 module Tiles
   Grass = 0
@@ -76,7 +85,7 @@
   
   def draw(screen_x, screen_y)
     # Flip vertically when facing to the left.
-    if @dir == :left then
+    if @dir == :left || @dir == :up then
       offs_x = -25
       factor = 1.0
     else
@@ -93,7 +102,7 @@
       not @map.solid?(@x + offs_x, @y + offs_y - 45)
   end
   
-  def update(move_x)
+  def update(move_x, move_y)
     # Select image depending on action
     if (move_x == 0)
       @cur_image = @standing
@@ -114,17 +123,28 @@
       (-move_x).times { if would_fit(-1, 0) then @x -= 1 end }
     end
 
+    # Directional walking, vertical movement
+    if move_y > 0 then
+      @dir = :down
+      move_y.times { if would_fit(0, 1) then @y += 1 end }
+    end
+    if move_y < 0 then
+      @dir = :up
+      (-move_y).times { if would_fit(0, -1) then @y -= 1 end }
+    end
+
     # Acceleration/gravity
     # By adding 1 each frame, and (ideally) adding vy to y, the player's
     # jumping curve will be the parabole we want it to be.
-    @vy += 1
-    # Vertical movement
-    if @vy > 0 then
-      @vy.times { if would_fit(0, 1) then @y += 1 else @vy = 0 end }
-    end
-    if @vy < 0 then
-      (-@vy).times { if would_fit(0, -1) then @y -= 1 else @vy = 0 end }
-    end
+    #
+    # @vy += 1
+    # # Vertical movement
+    # if @vy > 0 then
+    #   @vy.times { if would_fit(0, 1) then @y += 1 else @vy = 0 end }
+    # end
+    # if @vy < 0 then
+    #   (-@vy).times { if would_fit(0, -1) then @y -= 1 else @vy = 0 end }
+    # end
   end
   
   def try_to_jump
@@ -198,7 +218,7 @@
 
   def initialize
     super(640, 480, false, 20)
-    self.caption = "Cptn. Ruby"
+    self.caption = "Cptn. Nuby"
     @map = Map.new(self, "media/CptnRuby Map.txt")
     @cptn = CptnRuby.new(self, 400, 100)
     # Scrolling is stored as the position of the top left corner of the screen.
@@ -208,7 +228,10 @@
     move_x = 0
     move_x -= 5 if button_down? Button::KbLeft
     move_x += 5 if button_down? Button::KbRight
-    @cptn.update(move_x)
+    move_y = 0
+    move_y -= 5 if button_down? Button::KbUp
+    move_y += 5 if button_down? Button::KbDown
+    @cptn.update(move_x, move_y)
     @cptn.collect_gems(@map.gems)
     # Scrolling follows player
     @screen_x = [[@cptn.x - 320, 0].max, @map.width * 50 - 640].min
@@ -219,12 +242,12 @@
     @cptn.draw @screen_x, @screen_y
   end
   def button_down(id)
-    if id == Button::KbUp then @cptn.try_to_jump end
+    # if id == Button::KbUp then @cptn.try_to_jump end
     if id == Button::KbEscape then close end
   end
 end
 
 end
 
-CptnRuby::Game.new.show
+CptnNuby::Game.new.show