The art is great, but the music is sooooo good! Love how you implemented the concept of a fly buzz into it!
I also like that depending on the color of the item it makes the human swarm go slow! It makes you more aware of what you pick up while also discouraging just moving the mouse around fast. Great design right there!
Maybe clarifying that the color of the items indicates that on the instructions, or making the colors stand out more would have helped me understand the mechanic better at first.
Overall great work, and lovely spin on the theme!