I've uploaded the tank that I managed to finish EVERY level without getting hit on, the code you're looking for is A10054493, the name is "DoomsDaymare".
Load your tank with 5 spreads with a size as small as possible, travel around the edge of a field while aiming in the middle and holding fire, you will not get hit. Ever.
How boring is this? Not enough gunpoints, so you can't get any decent firepower. Either way, this lack of firepower and the ease of avoiding enemy missles doesn't make the game more difficult, just more tedious.
Fantastic game, unfortunately the controls are iffy using a mouse so only 4/5. Either way still a fantastic game that will keep you going for a very long time!
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