Addictive. BE ALL THAT YOU CAN BE!
Johnix (previous review) was incorrect. There are more than one levels... I'm not sure how many, since I couldn't get past level 2, but I'll be back to try some more! ;)
Some shiek-y music would be cool, but the screams when you hit the jars are pretty satisfying. I didn't even realize there were instructions, until I clicked on it by accident.