Simple yet creative game. The art definitely stood out for me. It has a distinct story-book style and I quite like that. The gameplay itself might be simple, but there are many interesting elements to it like how you control another gnat after dying, and how the eggs die when they're sprayed.
I do want to say that the game progression could be better explained. I didn't know that I can move forward to find the next plants until dying a few times (which admittedly wasn't that long). Adding sound effects would also make the game feel more complete to me.
Great job on the game!