I see the camera controls where also a pain for you :) Definitely an aspect that needs more work in the future, thanks for the review.
Little clarification for the bacteria not infecting cells, at the moment there is a creature cap due to performance issues. When you have around 40 bacteria they will no longer infect healthy cells. In order to pass the last valve you need 40 bacteria to "force" your way in.
It definitely needs work on the camera part, and on the clarity on what a user should be doing.
Thanks for the feedback.