There is a "cave" battle that you can NOT win!! And there is no option to continue without it. I have found this is other games, too. There should always be an option to move on if one has tried a few times and can't do a certain level. I have seen other reviewers who are also stopped here.
Also, the music is ok for a little while but gets very tiresome!! sounds like "leaky kettle" or something. A waste of a game credit.