If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Pigs Can Fly is a physics puzzle game. Your goal is to get the pig to the colored potion. To achieve your goal you have a pink, a green and a blue cursor. The pig can only be moved by the pink cursor, object on the screen only with the cursor of the same color. Every time you select a different cursor the timeline will start from the beginning, so timing is crucial!