Have a look at the following link: http://www.mes-games.com/past1.php
Click on grammar and then click on Pirate Challenge
In this game you are going to practice how to make questions and answer them in the past simple tense. Write below your comments about the difficulty:
It was a/an (easy/difficult) game.
And then your mistakes:
Eg.: In the question number ___ I wrote (incorrect sentence) instead of (correct sentence)