I think you have such a solid start! I like that the viruses speed up as time goes, it feels like they start dropping closer to where your pointer sits (though that could just be the nature of more and more of them spawning faster and faster). You even have a lot of options to push the concept further, since these sort of games have a lot in common with bullet hell- and you can take a page out of those books for ideas on how to add more juice. Some examples that come to mind: when a certain amount of viruses come and go, you could give the player an option of a couple of randomly generated boons ("pointer move faster" or "activate a shield" which has a fat cooldown). You could also give the pointer a point of health, but induce a weakness and lean into the virus theming ("move slower" or "more viruses" or "viruses are now X bigger", and it could be interesting to give the player the same choice from randomly generated weaknesses to give them some agency in how the game changes). A virus is adaptable, so you have a lot to choose from if you wanted to keep working on this game!
Congrats on submitting for your first game jam!