Bug: When you cancel a substitution, the player is displayed with his stamina bar full, and the "sub-that-never-was" has the bar depleted just like the original player. It's merely a display bug, though, it can't be used to vampirize bench warmers.
Bug: The game can be played in auto mode, but not the penalty kicks, which are supposed to require interaction from the player. However, if you hit the pause icon, you can access the menu and enable auto mode also for that part of the game.