nice job
The mini-games repeat in the sense that you can play the same one and the answers will be the same.
For the currency, not everyone uses or knows about Euros, so maybe that isn't the best choice for it. In fact I would take that out so as not to a) show a preference to a type of currency b) avoid confusion of currencies that some people don't know about.
Put more options for answers to each mini-game as you move up in difficulty, so that it adds that much more to higher difficulties.