Aliens in a Box

In this addictive physics puzzle game, your objective is to get the Alien into the shipping package so that it can go back to its home planet. Be careful, though. If he touches the ground, he will go crazy and self destruct. Each level gets more and more challenging. Use YOUR MOUSE and LEFT CLICK to Remove the wooden planks and boxes. Let gravity do most of the work. So, which level did you start noticing the creepy look on the aliens face when he falls?