Here's my main problem with this game: Too much healing on both sides, it's just time consuming and pointless. Oh, so the enemy just healed 400 now I healed 400, great, back to where we started. Nerf healing or remove it totally and this would be a much better game.
Pretty easy, I beat the whole game my first time playing in about 20 minutes. All you have to do is aggressively attack green and pick up grey spots secondarily and you'll win the first 13 levels easily. 14 you actually do need to gather some grey spots first, but then you just quickly assault the middle and the game is yours.
Necrosis makes that unit's attacks more powerful based on how many kill shots it has. The more % in necrosis, the more value the kill shots add. Place a necro near the back of your towers to maximize kill shots.
Currently on level 38... 37 was bad, this one is terrible, has anyone beat this game yet?
Really great, the only problem i have with it is you can knock a cube into a corner or something totally randomly and have to restart... even with flawless execution.