Aliens Motion Attack

I won't to create a video game This video game you will start as a Marine from Aliens with a scanner and random motion tracker is picking up random Aliens coming to get you.. You must DEFEND from each dot (Aliens) for servile. And Also for each kill you can lvl up and unlock gear. Also i would like to give a option to make each battle 3d if possible. But options for 3d is Only available before you start your defense. Maybe Have An option to attack back after we see how this application goes