I really like the concept although I might be somewhat biased because I made a similar game last year. The idea of hunting the infected cells and the longer you take meaning more enemies being created is a good way of having naturally increasing difficulty. I do think the spawn rate is a bit too high as it is very challenging right from the start. I also found it very hard to tell the enemies apart from the background which made the game a lot harder. Otherwise, solid top down shooter and I loved the two different types of fire and how each had its own uses.