This was an interesting idea. I liked the audio and the pixel art.
It took me a bit to understand exactly how to play the various card but once I got the hang of it it was pretty straightforward. There didn’t seem to be a lot in the way of trade-offs, I pretty much just drew cards until I could spread and periodically moved my troops to attack and infect others. But I never really felt like I needed to do anything other than plot a relatively straight course for the goal. I feel like with one more degree of freedom to create some trade-offs though, this could be pretty cool.
Nice job!