I think that the character should face which ever way you are moving then you can turn him with the mouse if you want to. Also i had bad guys spawning on top of me. it was fun though and I like the art nice job :)
This game was interesting in the fact that I like the puzzles but the interface was a puzzle in itself which should never be the case. Scientist Dont fight viruses with bacteria. However, a bacteria can be infected by a virus.
thanks :)