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diff --git a/samples/09_performance/02_sprites_as_entities/app/main.rb b/samples/09_performance/02_sprites_as_entities/app/main.rb
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+# Sprites represented as Entities using the queue ~args.outputs.sprites~
+# yields nicer access apis over Hashes, but require a bit more code upfront.
+# The hash sample has to use star[:s] to get the speed of the star, but
+# an entity can use .s instead.
+def random_x args
+  (args.grid.w.randomize :ratio) * -1
+end
+
+def random_y args
+  (args.grid.h.randomize :ratio) * -1
+end
+
+def random_speed
+  1 + (4.randomize :ratio)
+end
+
+def new_star args
+  args.state.new_entity :star, {
+    x: (random_x args),
+    y: (random_y args),
+    w: 4, h: 4,
+    path: 'sprites/tiny-star.png',
+    s: random_speed
+  }
+end
+
+def move_star args, star
+  star.x += star.s
+  star.y += star.s
+  if star.x > args.grid.w || star.y > args.grid.h
+    star.x = (random_x args)
+    star.y = (random_y args)
+    star.s = random_speed
+  end
+end
+
+def tick args
+  args.state.star_count ||= 0
+
+  # sets console command when sample app initially opens
+  if Kernel.global_tick_count == 0
+    puts "* INFO - Please specify the number of sprites to render."
+    args.gtk.console.set_command "reset_with count: 100"
+  end
+
+  # init
+  if args.state.tick_count == 0
+    args.state.stars = args.state.star_count.map { |i| new_star args }
+  end
+
+  # update
+  args.state.stars.each { |s| move_star args, s }
+
+  # render
+  args.outputs.sprites << args.state.stars
+  args.outputs.background_color = [0, 0, 0]
+  args.outputs.primitives << args.gtk.current_framerate_primitives
+end
+
+# resets game, and assigns star count given by user
+def reset_with count: count
+  $gtk.reset
+  $gtk.args.state.star_count = count
+end