Old Skool Shmup lives!!!

Old Skool Shmup is finally working in silverlight. I have one version of alien with two attack modes implemented. The aliens on the left hand of the screen attack to the right and the aliens on the right hand side attack to the left. I spent quite some time hacking together code to pick which alien to go into attack mode. I eventually scrapped it and am currently using FlxArray::GetRandom() to pick the next attacker. I am currently working on implementing explosions which for some reason aren't showing up yet. I suspect I am doing something wrong with the Flixel animation code but at this point have no clue.