to all:
thanks for the comments, keep em coming. It seems the biggest issue are the controls, i can guarantee if you take a couple of games to get used to them it is well worth it. I created a version with the mouse but not being able to shoot in any direction would be a huge disadvantage. :-)
Astrana: nothing will ever spawn ontop of you, you must have moved into something.
Turkey Lord
Spartan:
The sounds are all unique, either created by me in Soundforge or Creative Commons from the freesound project.
Thanks for the comments and ratings - keep them coming!
Draco18s: A lot of the clues are in the sounds, which are used to tell you when enemies and powerups are spawned ;-)
 "Fracture 2 : Infection"){kind=icon}
 "Tank 2008"){kind=icon}