Skipping a step
When I click on "I don't know the answer - skip", it should just skip to a different question. Otherwise, what's the point of giving the "skip" option? Right now it marks the guess as wrong and deducts a heart. That's not what it means to "skip" the question.
Thank you for the comments. I think the point I was trying to make is the option should say "I don't know the answer". The word "skip" implies that I can try a different question without penalty (to me anyway). It's not a big deal, I go over the lessons more than once anyways.