Gosub is a collection of utility classes and extensions to Gosu that are (hopefully) generic enough to be used in just about any 2D game.

There are a few additions to Gosu itself, such as the ability to use symbols (including letters!) for buttons:

window.button_down? :left_control
window.button_down? :zNew drawing shortcuts:

window.draw_quad 0, 0, 128, 128, Color.black
window.draw_pixel 32, 32, Color.white
image.draw_tiled 0, 0, window.width, window.height, 0, :tile_width => 32, :tile_height => 32Lots of helper classes:

class Bomb < Actor
def initialize
@image = Gosu::Image.load window, 'images/bomb.png', true
@pos = Point.new(window.width * rand, window.height * rand)
Timer.after 3.seconds do
Sound.play :bomb_explode
remove_from_world
end
super
end

def draw
    @image.draw_rot @pos.x, @pos.y, z_order, 0
  end
end

bomb = Bomb.new
bomb.add_to_world