Great job on the game! Interesting take on the concept of One-Time Use on plastic and enviromental concerns, at least, I didn't seem to find anything in game mechanics wise about it.
It's a well designed unwinnable style game, with plenty of options to fight off the pesky humans, really reminds me of flash games I used to play. The art is very nice, creating the whole area and then randomly roaming people and increasing rate of spawn, my army of foxes seemed to do quite well, muhahaha! Managed to get a high score of 40845.
The quest generator was quite nice too, the only problem was it got stuck once and clicking on it to resolve usually requres me to waste some energy by clicking on empty space unless we switch to the 0 cost one. There might also be an exploit of rapidly right clicking to proc the same item multiple times, like trash, or saving an animal, or even getting energy. A pause option might be good too, my streak got ended a little early because I had to leave quickly.
Great work on the game! It was simple but had interactive and naturally, steadily progressing gameplay!