Made my day.
Played this all day instead of doing the work I was supposed to be catching up on.
That was last week.
Damn you Newgrounds!
But, back on topic,
Great game, but gets rather too easy when you set up a few of those final turrets.
They last practically forever and gun things down with ease.
Plus, when you have 3 or 4 of those, the money comes in fast enough to either fill the screen with lower level turrets, or keep up a healthy 10-12 HUGE turrets.
Make it harder?
Make more turret types?
Perhaps, a way to 'charge' turrets without having them explode and have to be replaced?
A purchasable shield?
Just putting some ideas out there.