about 80% there
The controls need to be less awkward - either your N,M,A,and D keys are really close together, or you've got uber-long fingers. It got repetitive after the first 2 minutes, when I realized the enemy turrets fire on one spot...all I had to do was sit back and lob shots at them.
Make the AIs smarter, fix the control setup, and it will be much more playable.
Keep up the good work!