If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
You are the last angel! Kill vicious birds, defend yourself and your pet sheep from the enemies. Use your mouse to aim and left click to shoot. Pick up your sheep so that it would not fall into a pit! Have fun and good luck!
Mouse - To fly.
Left click mouse - To attack.
Space bar - To drop/pick the sheep.