Really great concept and super fun game!

one of the things that stood out to me was the outline you used in your text. The vector outline kind of ruined the retro pixel vibe you had going. I think i would have made the text flat or drawn the text by hand to give it that more Gameboy feeling.

Sound. You had really good sound but i think you should consider limiting how much audio is played depending how may bees are spawned. If you spawn a ton of bees, consider only doing 3 or 4 audio ques instead of one for each instance. I had to turn the volume down which was a bit sad cause otherwise was pretty good.

Pretty good simple game, enjoyed just firing and having fun! It was just a good time to play through!

Really simple SHUMP. Loved the little splatter effect of the mosquitoes; thought that was a nice touch! The victory tune was a nice little jingle too, along with the animation you had on the text itself.

Well done!

Pretty solid and simple SHMUP, nice! 
That mosquito sfx is perfectly fitting!

One small thing would be that some sprites seem to break the 160x144 resolution pixel grid when squash and rotated a little, but honestly it's no big deal here!