UPDATE: Adding enemies

Through testing the Game i found that there can be a few errors with the Aliens when entered in as a group although it may be easier to enter in these way. Occasionally the aliens are over lapping making it easier for the player to complete the level.

I also wanted to enter the ability of the aliens to move around, however I have found that it is extremely difficult to do this as the groups will all follow the same path.

So I have decided to insert the enemies individually as sprites and set there tween to different areas of the map so that the game is more consistent from every play. 

Here I have set the alien to certain area of the map which I will do with the other aliens that I enter in later.