Move the left and right keys. If you touch an alien, you punch it and it dies. You can also shoot bamboo at the aliens by pressing space. When ten aliens have touched the ground, the game is over.
The super-random story of this project~ There are a bunch of evil aliens who are attacking a panda and trying to steal its bamboo (again, no clue). The panda wants to FIGHT! "Yah! Get away from my bamboo!" (Trust me, this is one of the weirdest storylines I've made)