Afegit param.game.speed i retocats els update() de les seccions

source/credits.cpp

@@ -87,13 +87,11 @@ void Credits::run()
 // Actualiza las variables
 void Credits::update()
 {
-    constexpr Uint32 TICKS_SPEED_ = 15;
-
-    if (SDL_GetTicks() - ticks_ > TICKS_SPEED_)
+    if (SDL_GetTicks() - ticks_ > param.game.speed)
     {
         ticks_ = SDL_GetTicks();
-        const int repeat = want_to_pass_ ? 4 : 1;
-        for (int i = 0; i < repeat; ++i)
+        const int REPEAT = want_to_pass_ ? 4 : 1;
+        for (int i = 0; i < REPEAT; ++i)
         {
             tiled_bg_->update();
             balloon_manager_->update();
@@ -106,6 +104,7 @@ void Credits::update()
             updateAllFades();
             ++counter_;
         }
+        
         Screen::get()->update();
         globalInputs::update();