After playing for a few days, I decided to implement a new feature to the game. In order to really study the phrases, I though we should have a test in the end of each week, and if you pass all phrases you get extra hearts to your collection. This made us more motivated.

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When I first deigned the game, we were suppose to put money in the jar when we passed all steps, since it´s not supposed to be seen as a punishment. After the first week I changed this, so now we put money in when we pass, and if the other one do not pass you take money out.