FlappyBug: Propagate errors in Bug class

Move-construct Bug into the Game class to improve
error handling.

Author: creator1creeper1

Userland/Games/FlappyBug/Game.cpp

@@ -8,7 +8,8 @@
 
 namespace FlappyBug {
 
-Game::Game()
+Game::Game(Bug bug)
+    : m_bug(move(bug))
 {
     set_override_cursor(Gfx::StandardCursor::Hidden);
     start_timer(16);

Userland/Games/FlappyBug/Game.h

@@ -44,11 +44,26 @@ class Game final : public GUI::Frame {
         const float x { 50 };
         const float radius { 16 };
         const float starting_y { 200 };
-        NonnullRefPtr<Gfx::Bitmap> falling_bitmap { Gfx::Bitmap::try_load_from_file("/res/icons/flappybug/falling.png").release_value_but_fixme_should_propagate_errors() };
-        NonnullRefPtr<Gfx::Bitmap> flapping_bitmap { Gfx::Bitmap::try_load_from_file("/res/icons/flappybug/flapping.png").release_value_but_fixme_should_propagate_errors() };
+        NonnullRefPtr<Gfx::Bitmap> falling_bitmap;
+        NonnullRefPtr<Gfx::Bitmap> flapping_bitmap;
         float y {};
         float velocity {};
 
+    private:
+        Bug(NonnullRefPtr<Gfx::Bitmap> falling_bitmap_value, NonnullRefPtr<Gfx::Bitmap> flapping_bitmap_value)
+            : falling_bitmap(move(falling_bitmap_value))
+            , flapping_bitmap(move(flapping_bitmap_value))
+        {
+        }
+
+    public:
+        static ErrorOr<Bug> construct()
+        {
+            NonnullRefPtr<Gfx::Bitmap> falling_bitmap = TRY(Gfx::Bitmap::try_load_from_file("/res/icons/flappybug/falling.png"));
+            NonnullRefPtr<Gfx::Bitmap> flapping_bitmap = TRY(Gfx::Bitmap::try_load_from_file("/res/icons/flappybug/flapping.png"));
+            return Bug(move(falling_bitmap), move(flapping_bitmap));
+        }
+
         void reset()
         {
             y = starting_y;
@@ -153,7 +168,7 @@ class Game final : public GUI::Frame {
     const Gfx::IntRect m_score_rect { 10, 10, 20, 20 };
     const Gfx::IntRect m_text_rect { game_width / 2 - 80, game_height / 2 - 40, 160, 80 };
 
-    Game();
+    Game(Bug);
 };
 
 }

Userland/Games/FlappyBug/main.cpp

@@ -37,7 +37,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     window->set_title("Flappy Bug");
     window->set_double_buffering_enabled(false);
     window->set_resizable(false);
-    auto widget = TRY(window->try_set_main_widget<FlappyBug::Game>());
+    auto widget = TRY(window->try_set_main_widget<FlappyBug::Game>(TRY(FlappyBug::Game::Bug::construct())));
 
     widget->on_game_end = [&](u32 score) {
         if (score <= high_score)