Hi Luis,
many thanks for play. The game is complete (but later on I find a bug regarding the final score), but probably it is not well explained.
The objective of the game is to stop the traffic, you can do it using the signals and furniture (using shift to catch and again shift to release or space to throw).
The cars will change their lane once they detect the furniture or another car stopped, and once the 3 lanes are blocked, all the new cars will sum points.
Again, thank your for playing and for your feedback. It is the first Jam and it is really appreciated!