4/5 stars. In addition to the problems mentioned by others -- I can't often tell the difference between my character and enemies on the screen. Perhaps a palette change or a toggleable green/blue outline around the hero and allies would help? Also, PLEASE get rid of ranged attackers on sudden death matches. I've completed all except those just because they're so annoyingly luck-based.
The level where the Necromancers is introduced is the ABSOLUTE WORST level to use them, because the skeletons just spawn reapers. Try to avoid using barracks at all, actually.
Tip: Making lines of soldiers always works for wizards because of their power, and for soldiers if you max defence. Otherwise, for solders and archers, try to knock the enemy early by congregating many soldiers in one clump and destroying the enemy before he can cross the screen. This works with moderate-to-high attack and high push and will end battles in seconds.