The game is excellent, i love it; but 3 stars until you fix somehow that lag... hint: Possible deactivate all lasers textures, or maybe bullets; idk... but please, keep doing this job, is very nice.
There is a bug... in the cave; with the ranger, if you froze him, then you use your rune of storm, the mob get out the window, and start a walking loop; you can't hit him, he can't hit you... Then, nice game!!
Spam the entire map with fighters (just $25 each one) = enjoy the game.
Do that with a few shields deffending your main city and you better minimize the whole page because the flash player may explode...
There is a bug.. when you create a few mega - mega towers; the game crash at survival mode... maybe because i create a monster that attacks with splah, huge range, and 147248 damage... maybe I should play it at nasa launch room...
Crash when i was about to upgrade guns and that stuff; press twice space bar and then the game freeze... otherwise, very nice game, it mades me to remember the dino crysis buy system, 5/5 (spanish, sorry the fu**ing bad english )