Unbalanced
This game really needs balancing issues. The Rocket Jet wipes out the enemies bases in a single run at only level 2 Damage, and Combat Tanks with level 1 upgrades across the board wipe out the enemies Combat Tanks without taking any damage. Four rows (two squads with the default formation) of Rifle Men can take out a base in a few seconds unless the enemy pulls out a Combat Tank in that time and wipes them all out in a single shot. Turrets decimate anything that it's strong against with no challenge and do absolutely nothing to those it's weak against.
This game has potential, a lot of it. You just need to make the damage output less extremes of "No Damage" and "One Shot" and make leaving something at level 1 everything put you as a severe disadvantage later on against the exact same unit and not the other way around.
Even with the balance issues, it's a really fun play. It's fast paced, yet you can't win anything non-Air only without some strategy. It really keeps you on your toes on what to send and what not to. Fix the balance issues and it'll easily be a ten out of ten.
Also, make it so you can cancel a single unit without having to hit the X and delete them all.