Pretty cool for a first game ever ! And i guess it was bound to happen that someone made a game about the current situation :p
some small issues though i think.
I suppose you designed it this way on purpose, that if you get stuck you're softlocked untill you restart, but i'd say it could be a bit better to either not be able to not get stuck completely, or keep it as is, but put a way to restart from the level you've reached instead of having to go back to the very start each time.
With that out of the way, your game's good, the controls are responsive, i like your little hazmat character and your use of that light shader, i'd just say watch out about the style difference in your assets but other than that all looks good, i had fun sprayin away at this pesky virus !
Good job especially since this is your first cheers :)