Boring map and doesn't really look like the real Plant vs Zombies (yes, I played the original one). The gold coins (or little suns in the real game) spawn automatically and don't need me to go and click on the gold spawner to create a gold coin. In addition, where is the description of the gold spawner??? Terrain was sooooooo bad and chess-like, not really the terrain of Plants vs Zombies. There r many other issues that make this game different from Plant vs Zombies. Even if the aim wasn't imitating that game, this map lacks of good terrain and exciting gameplay. 1/5 sorry.
I suggest u to make the terrain less flat and more hilly plus filling it with doodads. Add more types of Zombies and make a victory condition (yeah, there isn't one so the game lasts forever).
Give credits to the creators of the models u used.