Okay, okay; I will enjoy
I literally laughed-out-loud the first time I saw the foot-shield. Other than that; the randomness only works mildly well. Basically, you keep fighting the same plant demons 90% of the time, so it's more repetitive than random.
Sound effects, however, seriously needed some work. It got annoying to hear the same thing so long. The solution is simple: make at least twenty different effects for the gunshot, and at least ten for taking damage. Make them take random turns. Boom: instant cure for annoyingness.
Another thing I don't like is the fact that the title gives away the fact that the game is random. If it were some generic title like, "Grand-city war of Hembloo!" no one would be expecting much. Then, as soon as they see what the game looks like, they'd be like, "holy shit! What is this?! Ololololol!"
By making sure that everyone knows the game is SUPPOSED to be random before they can even play it, they see what it looks like and go, "Yep, this is random alright. *small chuckle*"
Ultimate problem--though--is gameplay. Yes; it's just another shooter. And not a very good one. Frame-rate is choppy, animation is stiff. Animation-smoothness is a big part of gameplay, you know. In Mario World for example; the way that Mario moves his legs so fast is vital to giving players the feeling of running as fast as he does. It makes the controls much better; giving you a better sense of what you're doing.
Art design is great, though, so this is a good effort for being so small and quick. Continue working on your animation and controls, then make some more games like this.