Wow! I can see this being a sleeper hit like mouth washing if it were developed into a full story - very cool vibe and game play. I think the mechanics are a little tricky -i had to read the comments to understand what to do and alarming the guards seemed hard to prevent. Perhaps mousing over the mouth hole could have like the parasite a parasite mouth tentacle slither towards the opening indicating that you can infect through the opening. Perhaps hiding in lockers/closets and things to eat? That said so much potential here and very immersive. Making my victims explode was a fun twist haha. I could see you replacing the green with a bunch of chunks and gibs and splattering everything with blood decals. Guards yelling 'oh no what's happening?' etc. I infected several patients and really enjoyed it.