-Added NEW zombie type "Strong Zombie":

It is a normal zombie with 2 health

Regular plants need 2 shots to kill him but Quick plants can kill him in just 1 shot

-Added NEW 3rd plant "Sunfower":

It is a plant that costs 10 Pixel coins

It doesn't shoot. But it gives you 5 Pixel coins every 5 seconds

-Nerfed regular plant so it shoots 0.5 seconds slower

-Regular plant now shoots its first bullet 0.5 seconds faster

-Quick plant now shoots its first bullet 0.5 seconds faster

-Quick plant now stays alive for 17 seconds (before it was 16.3)