A Good Game With a Few Issues
You have made an uncommonly good Flash game--one of the best I have seen on Newgrounds!
There are, however, some bugs that could be addressed (e.g., there are two different names for the second level, enemy and explosion collisions with drones cause damage to the main ship, sometimes even hovering over a coin does not result in it being collected, and some of your text needs to be copy-edited by a native English speaker) and there is still room for improvement to the interface (e.g., you could default to high quality for the map and shop screens regardless of the in-game quality setting) and the gameplay (e.g., there does not seem to be any in-game indication of what special items the player has or what special item keys are currently available, secondary weapons seem to be lost after a level is completed even if they have not been depleted, and the mine-layer segment of the third level is much slower than the rest of the game up to that point). I hope to see an updated version of the game or even a sequel with the current game's issues addressed.
Keep up the good work!