There were a few problems I have had with the game but first, the positives! There were some things I liked:
1) Cutscenes! They're actually pretty well done if anything - though the story is a bit hilarious conceptually to say the least. Love your effort into the cutscenes - amazing how you could squeeze that into a jam if anything!
However I think the rest of your game requires some more polish, here are a few of what I mean:
1) When you jump on the moving platforms, the moving platforms simply move away - it makes it difficult to actually use the moving platforms for manuevarability. In fact, the moving platforms do not add much to the gameplay. Consider that.
2) The lack of a tutorial - many times I thought spacebar was the jump button but it was actually W. I think you should also dedicate an entire level just for teaching the player how to play.
3) Maybe an auto-shoot function instead of manual fire, that way gameplay is less tedious with having to spam the mouse button to kill them coronas. Curse you corona.
This is a very simple game where you defend yourself from the virus but it's very easy, and lacks some difficulty to make it challenging and interesting. It's also not very thematically relevant unfortunately - very good effort and definitely shows promise where it can. I believe you just need more experience - and with more experience, you will continue to make better games! Keep it up, and someday, maybe you'll make a story worth telling to the world.
Kudos.