Terrible. As if there are not enough games with oh so many adverts there are games like these. In that whenever you type in a correct answer the game tells you your wrong and you lose. Once or twice in a game like this can be forgiven but its every 3rd or 4th answer. Not only do you lose the game and have to start again or spend coins earned through correct answers but it will make you watch another advert just for the craic. Infuriating.