I got past 1520, but lost at 1703. I think I needed another Bottle to get past that wave. 
I got past 1520, but lost at 1703. I think I needed another Bottle to get past that wave.
Oh, that might have helped me to add even more flamethrower walls. I liked combining them with ghost ships and catapults to keep the pirate ship trapped in a little "killzone."