nvm the comment i just posted!!!!
here's OSquared's awesome and better strategy
ZOMFG! I beated it on hard O_O =D Sell Fighters. Gun RoF L1, Gun Damage -> L4, Gun RoF L2, Gun Damage Max. Repair Drones ->L2, Drone Repair L1, Repair Drones ->L4, Drote RoF L1, Max Drones, Drone Repair L2 Gun RoF-> Max Drone Repair L3 2x Lazer Turrets Drone RoF -> Max ANYTHING YOU WANT (I bought and upgraded all my fighters at this point and also bought a few middle turrets, the reast fo the game was much easier, fighters help get rid of mines, and keep the enemy away and you can concentrate on the big things w/ the gun)
Just finished Hard Mode. Comment on page 9 made it rather easy, actually. Don't waste your money on fighter bays. Copying comment that helped me. Game gets 5/5. It is not the programmers fault that Kongregate chose to put an extremely hard badge on this game. Upgrade Order (Hard Mode): 1. Sell Fighter Bay (makes aiming easy) 2. Gun Fire Rate 1 3. Gun Damage Max 4. Gun Fire Rate 3 5. Cheapest Repair Drone until Cheapest is 300 * * BEAT SNAKE * * 6. Add Fighter Bays plus 1 # of Fighter upgrade to help get past mines 7. Gun Fire Rate Max 8. Add Turrets (middle, then back, then front) 9. Gun Speed Max (Can be done a little earlier) 10. Get All Fighter Bays with + 1 # of fighters to get past more mines Good Luck! Hope this helps. Repost this if it helps you get the hard badge.