Really good effort, absolutely loved both graphics and music. Gameplay wise I found that enjoyable too, using a bit strategic placement to take out many flies at once.
Some feedback on tongue "reloading" would be appreciated.
Variation in gameplay would ramp up difficulty and keep things interesting - maybe different flies or some obstacles to avoid (I was already thinking this is endless game, but then I noticed that the music is kinda ending). I didn't get to hear variable music once during first playtrough because of how easy the game is. I then tried again just to listen how the music changes with the absence of band members - very nice!