It was fun and had that spooky factor when you can't see where the spy is all the time. You had to try and keep track of where the spy had last been at all times.
This game has a lot of potential, especially if given more ingredients for the antidote and needing specific ones. Or needing to deliver antidotes to houses. There is sooooo much potential and I hope it's given more love!
Here are some improvements I think should be made in its current state:
Start off in a random location. I always start on 2, 2.
Turn down or change that dang game over sound. It scares the crap out of me every time lol
Better last location detection. It doesn't detect last location very well. It told me he was on 1,4 for at least 3 turns when I clearly saw him on 1,1.
It can be a bit difficult to find him without being killed while he's invisible. Maybe give us a few extra ways to track his movements? If there is already a movement pattern maybe we could have a way to keep track of it? Some of us have a horrible memory.
All-in-all, great job!