I really liked the difficulty/power curve.
For example, seeing more and more bugs got be exhausted, but getting the big jump gave me a little break and let me feel powerful.
I really liked the visual effects and the art, but I also really liked the sound effects. I didn't see a lot of people comments about SFX in the jam submissions, and I'm kind of part of the problem, but for your game, I really have to mention how the sounds and music really fits with the ambiance.