No problem, your english is fine! Unfortunately Cruel Serenade isn't supported for android use. The black square issue might be resolved by tinkering with your mobile web browser and running index.html directly, rather than trying to run the game through joiplay, but even then I use a number of plugins that probably won't play well with mobile, and this will only get worse, as the secondary save system I'll be introducing for 2 will require some basic local file saving and shuffling. For now at least, Cruel Serenade is only a Windows Desktop game.