Broken by adverts

This app could easily become a 4 star, but their greed had killed it. An ad pops up after every quiz. Also, it seems like allowance for clicking the ad is less than half a second, making it very easy to accidentally tap while going for an answer, but clicking the x is only possible after 1.5 seconds. Finally, and less importantly, shouldnt the app be landscape?

Jtotd about Math Academy