Overall graphic is really good, only people seems a little off with the environment.
I found it difficult to know how exactly the game works. First I avoided people to not cause allergy, then I used as much pollen as I could for every person, and then I tried to use only one pollen per person.
When I had no pollen left, I couldn't get how to have it back. I thought that I had to catch the leaves falling or the dandelions on the side of the street. I realized then that maybe it's just a matter of time.
So I would make changes in this direction. Make the player in full control of his pollen: make him reach for dandelions to recharge it and then rush back in the street to catch people, make him focus on precision trying to consume only one pollen at a time, show a clearer collision box with the people.