Thank you for playing the game and for your great and detailed feedback!
The infection mechanic on the grid was the first element we decided on in the design phase mainly because of the gridlock wild card.
When debugging the game seeing the infection spread at really high speed was mesmerizing. Makes me think of adding time speeding control like in Plague Inc. Evolved and The Sims.
The cards came in on the second day as I started to explain to our other programmer what we need to make and just spew out something about cards and they all liked it.
During the development we used the default background for a 2D scene in Godot and we realized we need to add it on the last day and our artist is in a totally different time zone but he pulled through and we made what we could.
The music is awesome I don't really have any interesting thing to add from the development except we all liked it.