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.