Well it's more of a creation tool than a game I'd say.
it kept crashing for me!
tryin to catch up i see
Relying on your co op partner to kill em all of melee everyone to death?
Nah, theres a good solution where you speed run it. Didnt even need a second controller
Receive all 20 awards in the same zoo (Challenge Mode only). - Zoo Tycoon
Refill the animal cleaning stations 250 times. - Zoo Tycoon
Use the Track Editor to find and pick up the 'Fifth Key' in the Fusion world - Trials Fusion