How to Play Mission Savane Board Game

About Mission Savane, from BoardGameGeek:

Wicked poachers have captured all of the creatures that normally roam free in the savannah! Work together to free them: Wait until nightfall, then go nab the keys to unlock the cages. Hurry though – and be careful – else the poachers might catch you, too! Aim of the game: Work together to free the twelve animals before the poachers realize. In turn, draw a tile from a bag and use either the key, the shown animal or both to free an animal from the board, or rouse suspicion among the poachers. Be careful when freeing the animals though, as freed animals of the same species placed next to each other will make a racket and warn the poachers!