Interesting for a while, but...
Oh, man...by the time I was on level 35+, counting over 100 sheep each time was a pain in the ass. It just takes way too long, and frankly if I hadn't clicked on the close button, it probably would have driven me insane. I would have had to sit through a whole bunch of 5 minute sorties of sheep just to lose on purpose and get my name in the ranking. At that point, I had simply ceased to care.
So, basically, it starts out being cute and fun...but winds up being a headache. I don't know if the levels ever end, but I wasn't about to find out. There needs to be something to break up the monotony somehow. It just becomes too much of a chore...even if it is extremely easy.
Graphics are cute and cuddly, though. ^.^ The sheep animations are also fun. The idea of the handicap randomizer is good, as well. It just seems to go on forever, and I had no choice but to stop or risk getting a migraine. Nothing extremely original or groundbreaking, but it makes for a nice diversion in small doses.