Thanks you for taking time to give feedback :
- Music : You are right, I did not took time to add standard "homebrew" key feature, such as Flip, or Option 2 to mute music, but an option to just mute it would be fine also (and music were just placeholder as I am not musician)
- Tutorial was intended to be a "real" tutorial : when a new kind of tile entered in game, corresponding screen was displayed , but it was a bit confusing, so I removed it. Moved all instructions screens to be seen via the Tutorial button in options (yes, would be better to rename it as Instruction) but first feedback from a new tester was that he did not understand the game without instructions, so I finally put them just before the start of the game. I will rework on structure and content of help screen also.