Yay I cured the world of germs...
I think this was pretty well designed although a few things led me to become bored.
In level 4 I could just sit on top of the virus and "bump" away all the little germs coming towards it. I left and ate dinner came back and I had about 10,000 points to spend.
I think if you slowed down the germs, increased their numbers, fixed the bumping into the main virus, changed the landmine to blow up on contact instead of immediately, and maybe changed the playable blood cell to a nanobot with a tiny laser gun, upgradeable by power-ups, you'd get a slightly better game.(Also maybe a slight increase in the playing field size, it felt a little cramped.)
Looking forward to a possible fix, or new version.