If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Shooting wolves from a helicopter is just cruel. But throwing deer from a helicopter? That's sportsmanship!
Space bar - Throw Deer.
Left/Right arrow keys - Move Deer left and righ.t
Choose from 3 types of deer to build a "team" of 9 deer. (Note: Each type of deer has specific damage-wreaking capabilities.)
Throw the deer from the helicopter, damaging the passing cars as much as possible.