Cow-Invaders

Use the "A" and "D" to navigate left and right

Hold left mouse button and aim with the mouse to shoot the cow into space (UFO can only contain 1 cow at the time)

Click right mouse button as fast as possible to beam up a cow

The goal is to remove the cows from the planet to save it from global warming.  Every 6 seconds cows on the planet farts and damage the ozon layer.