Players take turns to play a tile to the table. Whenever you complete a closed network of paths of your colour (pink/yellow), place a stone on every house of your colour that's connected to that network.
First to place all of their stones wins.
If you try to complete a path, but when you lay down a tile, it doesn't complete, look for other exits for the path. Four-way crossroads that don't have an underpass will extend your roads.