When the game is over, press the middle button and choose Avsluta (Finish).
In playoffs, it is not possible to end a game when it is a tie. Instead you will see an alternative for penalty shootouts (Straffar).
Do you want to go back, press Fortsätt (Continue).
(Translation: Fortsätt=Continue, Straffar=Penalty Shootout)
In penalty shootout mode you'll just carry on registrating goals as earlier. When you are done, press middle button an choose to finish the game.