Make localization parameters better, and add a single frame animation helper

samples/button.rb

@@ -1,4 +1,4 @@
-App.run 720, 480, "Button Test", fps: 60
+App.run 720, 480, "Button Test", fps: 240
 
 main_scene = Scene.new
 
@@ -9,6 +9,8 @@ bg_image2 = Image.new "assets/images/game_over_dead_bg.png", pixel_art: true
 
 bg_animation = Animation.new [bg_image1, bg_image2], fps: 5
 
+bg_image1_a = Animation.from(bg_image1)
+
 App.language = :en
 App.localize(:en, :btn_text, "Click %{name}!")
 
@@ -38,10 +40,10 @@ rect.click do
     0x00FF00 :
     0xFF0000
 
+  pp text.params[:name]
   text.params[:name] = text.params[:name] == "Me" ?
     "You" :
     "Me"
-  text.params!
 end
 
 App.map_key :mouse_left, :action_name
@@ -54,9 +56,8 @@ App.update do |delta_time|
   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
+  # puts "Delta time: #{delta_time}s"
 
   el = App.scene.elements_at(App.mouse_position)