Yes sure, lvl 15 is difficult as bull, but when you've finished that and some of the next lvls, how are you supposed to defeat lvl 20, that is ridiculous.
I wish I knew what can give the final hit, they just seem invincible.
Like, it's a really good game concept, and it's done really well, but I feel like they didn't do a good job explaining how to play the game, it took me a while before I figured out what I was supposed to do!
I like how I was getting three stars first try in the first nine lvls of animal lair, and then at the last one I got obliterated within 10 seconds. Lulw