Not sure if this goes here or not.

A save feature would really be helpful.
I have been working on Stonehenge for a while now trying to get the achievements. Finish the level not taking control of a turret, and Repair 40 times. I am using Cobra and trying to complete the map only using Cobra. I have been playing this map on and off over the years. One the most frustrating parts is after a defeat it takes about 30-45 mins to set back up to get the boss again. It's discouraging after about the 2nd or 3rd attempt to continue to do this, shaving off that time I would be more inclined to continue to play this game.