Really loved the game! I will say that there's a bit of a weird difficulty curve, wherein Wellington's map design proves to be more difficult than any of the other maps. There's also definitely an issue to be had with the countdown timer occurring upon initial infection rather than the full transformation, but your most recent comment addresses that!
The only request I'd have with more unique sprites is that it seems to be mostly men and as a woman who loves women, I wanna see more girls.
Thank you so much for the work you've put in for such a fun game! It scratches the old Infectonator itch I forgot I had ^-^