Afegides descripcions a algunes classes

Eliminats parámetres no necesaris als constructors de classes

source/instructions.cpp

@@ -16,7 +16,7 @@ Instructions::Instructions(SDL_Renderer *renderer, Screen *screen, Asset *asset,
 	// Crea objetos
 	eventHandler = new SDL_Event();
 	text = new Text(asset->get("smb2.gif"), asset->get("smb2.txt"), renderer);
-	tiledbg = new Tiledbg(renderer, screen, asset, {0, 0, param->gameWidth, param->gameHeight}, TILED_MODE_STATIC);
+	tiledbg = new Tiledbg(renderer, asset, {0, 0, param->gameWidth, param->gameHeight}, TILED_MODE_STATIC);
 	fade = new Fade(renderer, param);
 
 	// Crea un backbuffer para el renderizador