New tile animation blocks the game
Since we fixed #4 (closed), playing the game fast cannot crash the app any more because it is no longer possible.
On normal speed setting, the moving animation speed seems fine to me but having to wait until the new tile “dropping” animation ends bothers me.
I guess the dropping animation is too slow so when I have already made my mind about the next move, it is still in the middle. Or maybe the animation curve has just too subtle ending so I am not sure if I can already press the arrow key or have to wait few more milliseconds.
I think the ideal solution would be to drop the tile immediately when user wants to make a move after the new tile started appearing. (Though we should do play testing to be sure.)