i understand for the tutorial screen. In order to solve it i must add a savegame because reset button only reload the level so i had to keep it like this for the small amount of time. For the draging i was thinking that i have add an arrow in the tutorial but it's a lot of info in a small amount of time. Your idea to clarify the icon is good i could have put a 50% opacity empty cell.
Thanks a lot for the feedback i realy appreciate your compliments.