Plants v Zombies

I didn't really like the game all that much. I'm all for games of this type but after spending about 20 minutes playing I stopped. I just didn't find it all that challenging and was looking for a way to skip levels. The zombies never advanced very far and while the mechanics were intriguing I became bored due to lack of strategy. I would much rather play a game similar to this called Desktop Tower Defense. Here you can at least amp up the difficulty by immediately advancing to the next level (while continuing to play against the current wave) if the challenge isn't enough. There are also many other games modes that can be played after the initial trial has been completed. Plants and Zombies takes a step in the right direction but just fails to deliver.