Very immature, addictive, puzzling and funny. After all, it's Looney Tunes.
Bugs Bunny's Lost in Time was alright, but it was missing something. That something has been replenished in this game. Taz and Bunny's ability to cooperate and role-switch were brilliant additions, along with the witty and funny characters.
What I definitely liked was the thematic division of the levels; Arabian era, Aztec era, Transylvania etc. Bosses were hilarious and mind-blowing. The graphics, if you consider this is an older PS game, were actually very good and totally cartoon-like.
Additionally, the game isn't very easy. It will definitely demand a certain amount of time from the player to go through and analyse the levels. The story was brilliant, incorporating authentic Looney Tunes characters and voices.
I think everyone should try out this game. Even if it is stereotyped as "for children", I'm pretty sure even the more experienced players would find some levels quite time-taking.