The answer to the Missle Tower Question is
its not worth the money. you can beat it without it.
im going to give a review
well the game itself is awsome.the zombies come in a little to fast and the missile silo is wayyyy overpriced.
But like everyone else says the Missle Silo is overpriced for its power. The lazer tower far surpasses it with its speed, and the sniper tower is way cheaper and deals lots of damage fully upgraded.
Great Tower Def Game
Giving it seven stars becuz I have beaten these levels and well It wont go pass lvl 51 for some strange reason you got a minor defect with the game. In Zombie Defense 4 it did not have a problem like that... So i dunno, its still a very great game to play when you have nothing better else to do lol.. I enjoyed it and I hope everyone else does to.
Fun, but unbalanced
Fully upgraded sniper tower costs (in total) 160 gold and does 700 damage per shot. Once I figured this out I skipped to the hardest mode and beat it easily with 6 sniper towers in the corner. Ridiculously easy, all the other towers are useless.
Speaking of other towers, I stopped building at level 25 (needing no more snipers to win), and started saving for the missile silo. It took me until level 46 to save up the money, and after buying it found that it didn't seem to do any more damage than my sniper towers. Pitiful.
Also, it takes 21 levels to save for it, and it has an 8000 gold first upgrade? I'll bet a million dollars no one can buy the upgrade without hacking, so why did you include it?