I've played probably five or six games and i've reached the end in two maps (Dave's Mansion and the one with Cucumbers) with the zombies.
It's SO rewarding when you arrive at the end, seriously awesome stuff (also the final stage of the battle is based on a different goal, like sending 5 CPU controlled zombies inside the mansion or blowing up 4 rockets).
With the plants, i once scored a perfect victory holding every base... so maybe plants have a slight advantage, but it seems pretty balanced to me.
Glad you like my style buddy, i appreciate.
I did the Chomper as well (90% done), here's a preview:
I plan on making a composition kinda like the one i made for Hyper Light Drifter, i want to pay homage to Popcap since i do love their games and their attitude.