It's a very awesome idea I couldn't complete it to the last level I completed the first 2 levels
It's a rage baiting game like getting over it maybe try to make it like that ad game where you are a gun and you go and shoot at the enemies
I Stayed a whole 10 minutes just clicking the play button LOL
About the idea of the gun it's every click it shoots a bullet in that direction and instead goes the reverse way which is smoother than that angle and you would be going and clicking to shoot a enemy it would be soo smooth and so addicting try it