nice concept, the graphics filter is a bit too much for me, but maybe that's just me :D 

I really like the idea of having a specific target you have to infect! Although I would recommend adding checkpoints! Also, It was a bit annoying how they were able to detect me through barriers

Cool game! Works very intuitively, and the idea of parasites moving through sight is pretty scary. Nice job!

Appreciated the warning when the enemy turns around, I got confused at the door when the screen went to black and will stay back unless you moved forward. I like the crt filter, it sells the theme of the game

Cool. Easy to understand. The enemy pattern is easy to understand. 

Cool concept. Nice shader. I like the predictable, well-forecasted AI movement. I might suggest checkpoints, so you only go back to the last door, instead of the start of the level. But maybe that would make it too easy?