Play NullCat Online Game. One of many Puzzle Games to play online on your web browser for free at KBH Games. Tagged as Cat Games, Puzzle Games, and Puzzle Platformer Games. Upvoted by 5 players. Other games you might like are Book Hunter and SMW: The Second Reality Project Reloaded. No download or installation needed to play this free game. Hope this game brings a little joy into your daily life.