1) too much of a grind
2) adding non-player-dependent misses is stupid. Turns to be a game of luck. Sometimes you get killed in 0.1 seconds, sometimes you shoot enemy for like 10 shots and none hit.
@mission5: use brains. Meaning -- spam knigts and 1 building of ballista. => win. Archers get stuck at gates, all rest are killed by towers, enemy gates killed by ballistas.
lvl6 feels weird. I got totally same buildings as enemy, have defence towers, but for some reason enemy troops reach my gates. Ok, enemy has ballistas, I do not. But that's +1 attacking troop. I have a very strong feeling that enemy spawns units disregarding his buildings and upgrades...
I just don't see the reason to have more than like 12 towers: you just will no have dmg to kill armored creeps, or you'll have extra dmg for all of creeps... Seem to be pretty common balance issue with most of td games.
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 "Moonhex"){kind=icon}
 "Golden Duel"){kind=icon}
 "Obliterate Everything 3"){kind=icon}
 "Crystallium Wars TD"){kind=icon}
 "Stormy Castle"){kind=icon}
 "Cardinal Quest 2"){kind=icon}
 "Heroes of Mangara: The Frost Crown"){kind=icon}
 "Hex Empires: Grave Consequences"){kind=icon}
 "Idle Tower Defence"){kind=icon}
Perhaps you should update Unity Webplayer?