I did throw mugs on the ground. Eventually, one mimic mimicked one mug, but that was over the course of at least 20 minutes watching them walk around the mugs. I might have just had bad luck, but I kindof suspect an issue is drastically reducing the mimic rate.
I loved the atmosphere, and the music and graphics. It's a beautiful project. If you keep developing it, I would love to spend more time in this cool mimic space once there is more to do.