I am now officially a Sigma Giga Chad Pro Gamer.
I like the idea of your game. It was really fun. The cells are all very cute, especially the player-character :)
I found infecting the cells quite janky at times, especially when all of the cells are after me. Maybe try increasing the distance you can infect within. And for purple cells, you could make it more obvious, that they noticed you.
Other than that, just more. More levels, more enemy-types etc. If you plan on continuing to work on this project that is.