Alien Overrun

This is my Alien game. Being a huge fan of these aliens, I had searched the internet for gif images, and found a few, so i used them in my game. All you have to do in this game, is read the how to play and maybe the credits, and then play. I am aware of the bugs. Try not to move onot another floor by hitting the edge, as you might go through it. If that happens, just move out of the edge. If any bugs are found, plz i ask you guys to help me by reporting them thankz I apologise for any bugs you encounter.

Note: this game is not finished, so after the 4th level (background is of the newborn's face) he should tell you game over when you hit the exit. There are 4 levels total.