Defend the body from the invading viruses in this challenging Tower Defence game.

Author Comments:

*** I've updated the game a fair bit from it's first release, hopefully it should be a little more enjoable to play, and a little more difficult. I've tweaked tower strengths and addressed some of the issues raised, thanks for the reviews! ***
With 10 different maps (8 to unlock) strategically place and upgrade your towers to beat each level and unlock the next.
This was great fun to make, I hope you enjoy it. I learnt a lot and developed a few new techniques while coding it. I bought most of the artwork from istockphoto, did the design work and made the music myself.
I find it REALLY hard to play so let me know what you think of the difficulty level.
Cheers!