Thank you. I'm so new to this. If you got any feedback lemme know. :)
There's an artist on itch io named Penusmbic who does pixel art in a 8/16 bit type style. I think he has tutorials, etc on his twitter. You might want to look at his stuff because his work is amazing. Re: your viruses, it might be helpful to add attack, idle, move, damage and death animations so that people can use as enemies in a video game.