At first I didn't understand the reviews that said the levels got impossible early on, then I tried to play an event, and it starts out fine but then on the last level before you get the prize, suddenly it's impossible difficulty! Games that do this, or something similar, frustrate me, because I usually enjoy the game, but when the levels get impossible to beat, it's no longer fun or relaxing to me. :( If grinding through levels doesn't sound like fun to you either, don't play this game.