I love the fact that you work in Java (I do the same, and enjoy it very much)
it was very cool, that the game is not like a usual window, but just the sofa with the cats i them. I didn't know what to do at the start, so I just tried to move the cat back to the sofa, until its head exploded!!!!
Btw, for anyone else that tries this game, and gets the "A Java Exception has occurred" error, what you can do is go to the cmd, go to the folder with the game, and write java -jar squish-cats.jar. This will launch it :)
Anyways. Great job! :))