From the publisher's website:

Each player has to make the prettiest planet as possible in order to shelter the dear friends of the Little Prince: sheep, fox, elephant or rose. Each round, you take as many tiles as there are of players. The first player picks one and appoints the next player, who picks one of the remaining tiles and so on. The last player who gets a tile become the first player of the next round. As soon as a player gets 3 boabab trees on his planet, he must turn the 3 corresponding tiles over. They will not count for the scoring at the end of the game. The game ends when all the players have their little round planet completed with 16 tiles. Then each player scores points depending on the characters who are on the 4 moons around his planet and the various items on his planet. The player who has the most points is the winner.