Good afternoon!
We apologize for the late reply.
We are sorry to hear that you encountered an error.
Are you running the game in the browser from a mobile device or from a PC?
Does the game lag or slow down?
Maybe it's a bug in the game, when counting the number of particles (dirt, graffiti, etc.) the game crashes and doesn't run the functions for the next clients. We have redone the counting system and now everything should work properly.