I like the simplicity of this game, but I do have a few suggestions. Firstly, maybe spawn them on one side of the screen, rather than in the middle. Secondly, I found a bug where if you click both at once, they count as just one kill, and the other just magically disappears without anything happening. Thirdly, maybe add some kind of background. Fourthly, the pace of the game could be sped up just a little bit, or maybe add some sort of progressive difficulty increase. Overall, I think the game looks amazing, but it could have a few changes to be improved.