Announcing Toadzilla, my entry into the B-Games Competition. You play as a mutant toad that has grown enormous and seeks to destroy mankind. This game will feature:
• Glorious 2D animation
• Fully destructible environments
• Giant radioactive toad
• Pathetic human defenders
Here is a screen shot of early development:

EDIT
Here is a screen shot of the final game

You can test it out at:
http://www.monkeydev.com/toadzilla/toadzilla.zipcontrols are:
W A S D move about world map
Left Mouse: place building
Right Mouse: damage building by one state, click more until the building falls down
Esc: Exits
Please let me know if you are getting any runtime errors and what they are.