I agree with FlashFan
the bullet speed leaves something to be desired because everytime you shoot at an enemy, they move out of the way. The shield does completely nothing for bullets. The cash flow sucks because you only get so little out of killing 1 enemy. The enemy damage is insanly high while it takes 3-4 shots to kill 1 aircraft. The enemys can shoot AS SOON as the get on the screen the repair costs to much for to little. The tower upgrades barely do anything. The Rate Of Fire (ROF) NEVER changes at all. I ,also, do not know how this game was even liked enough to pass the portal to get in here. The hit ratio is bad because even if the bullet is right by the enemy, it doesn't make a hit. The bullet just goes right on by. Fix the bugs and then you might have an enjoyable game.