First of all congratulations and thank you for this "beuty" and addisctive videogame, its really funny project.
The only "mistakes" that i saw: Sometimes when you finish reloading your weapon, it did a shot and i dont press any input. Its a little mistake, but i said, in case you plan to make a sequel or continue your game (and you should :) )
and another mistake its that, when you kill a frog, usually you dont know it, and sometime change you objective,i think that, you could add a signal (like audio, message...) to know when they are dead.
The good thing? all, its a really great game, the gun shot sound its really satisfyting, bodies destroying its beauty. And the most important, its so funny!!
Congratulation again. <3