i just discovered a bug... while on nazeru's gates i casted the meteor spell 1 milisecond before the genie boss died... so game froze up, the meteors were just flying still, i could click towers and soldiers and vultures, etc, but coudntl do anything else, the level didnt end and i had to reopen the game.
the concept of the game is really cool, but after a few level the game just gets repetitive, nothing new... maybe adding some upgrades... like more powerfull granades, more health or better weapons, cause shooting only one type of submachine gun and 3 types of bombs gets you bored in 10 minutes!