Nice game, though glitchy. Glitches aren't too annoying, except when the glitch that makes you skip battles by only showing the "go" button happens when taking cities. You then have to either die or refresh and start the trip over again.
Hard mode needs some changing. The AI is just as bad as it is on normal mode, and the only different thing is that the units are stronger. Try making the units normal strength and the AI smarter (level 8, two of the war machines moved right into the range of my condors)
 "This is the Only Level"){kind=icon}
 "Balance Balls 2"){kind=icon}
 "Frontier"){kind=icon}
 "My Pet Protector"){kind=icon}
 "Battalion: Ghosts"){kind=icon}