How do you beat the last level of panda sniper

In the last level of panda sniper 1, you have to shoot the window where you see the biscuits and wait for the ghost to come and pick it up. Then shoot the middle upper window next to where the ghost is, and wait for the ghost to move there. Then shoot the window all the way to the upper right side and wait for the ghost to move there. Then shoot the gold door bell on the right side next to the door. The ghost will drop the biscuits and it will fall out the window and Panda will catch it and run all the way home and eat the biscuits and say "yum yum" and you win!