Fix loop to be more accuratly timed, and added custom ruby libs inclusion setup

samples/button.rb

@@ -22,6 +22,7 @@ rect.on_click do
   rect.color = rect.color == 0xFF0000 ?
     0x00FF00 :
     0xFF0000
+  main_scene << text unless main_scene.elements.include?(text)
   text.params[:name] = text.params[:name] == "Me" ?
     "You" :
     "Me"
@@ -30,35 +31,45 @@ end
 
 App.map_key :mouse_left, :press
 
+start = Time.now
+c_ = 0.0
+c_c = 0
+
 main_scene.on_update do |delta_time|
-  # puts "Delta time: #{delta_time}ms"
+  c_ += delta_time
+  c_c += 1
+
+  # puts "Delta time: #{delta_time}s"
   # commented out to avoid spamming the console, but you can uncomment to see the delta time being printed every frame
   # runs at 60fps, so you should see around 16-17ms being printed
 
   el = main_scene.elements_at(App.mouse_position)
 
-  puts App.text_input if App.text_input != ""
+  pp App.text_input if App.text_input != ""
 
   next unless App.pressed?(:press)
   
-  puts "#{App.pressed?(:press)}, #{App.down?(:press)}, #{App.released?(:press)}"
+  pp "#{App.pressed?(:press)}, #{App.down?(:press)}, #{App.released?(:press)}"
 
   for elem in el
     if elem == image_element
-      puts "Down over image element"
+      pp "Down over image element"
     elsif elem == rect
-      puts "Down over rect element"
+      pp "Down over rect element"
     elsif elem == text
-      puts "Down over text element"
+      pp "Down over text element"
     end
   end
-
 end
 
 main_scene << text
 main_scene << rect
 main_scene << image_element
 
-# main_scene.delete(text) # Uncomment to test element deletion
+main_scene.delete(text)
 
-App.start main_scene
+App.start main_scene
+
+p "Average delta time: #{c_ / c_c}s"
+p "Time since start (real): #{Time.now - start}s"
+p "Time since start (from dt): #{c_}s"