Jupp, I decided to make a 3D game from scratch, that means engine and everything, and I succeeded (obviously)
My good buddy Lennart contributed ALOT to this game, among other things he made the music and sound controllers, the menu music, everything that even resembles a menu, the internet minisite http://www.atomicdefender .com including the instructions.
Use [ARROWS] or [A],[W],[S],[D] for movement, use the [MOUSE] for turning, aiming and shooting (this was the best solution I could come up with). [P] for pause. You will be able to choose new weapons two times, first after 7 kills then after another 30 kills. Try to get as many kills as possible, personal best is around 100 kills ;)