Simple and complete.  Honestly if you added something stupid like physics to the green goo dripping down the screen and let it pile up and get gross this would be a good mindless entertaining toy to play with.  

Its a great concept and it could be turned into a full game! Add more fluidity to the insect slapper. And maybe add a timer. Great game tho

The game is quite nice and easy to play. It's a good game making it in just under 24 hours. However, it could've been better if it was polished and there were audio in the game. Maybe you can randomize the speed of the flies to make it a little more engaging.

Nice game, I could see it being a great time waster with a bit more polish!