I'm definitely NOT playing that one 7 minute long level again just to get that 3rd star because I stepped once on that lava pit whilst destroying all enemies barely getting hit, but it's just impossible to go faster, so yeah; long-ass levels just make the game boring. 2/5
It's really annoying when you have a tank with 100% taunt and it ALWAYS has a barrier on him, so that he becomes the most useless minion in the whole game.