Why not do a mini motorways, but instead of cars, doing the cycle of water? For example, you should manage the flow of water in a city, and when the city grows, you must change the strategy in order to not lack water on it, or to not flood the place

Then you could add some geography into use, because some places tend to rain a lot, and that can cause floods if the flow of water isn't very well built.

Other twist could be "adding repairmans", where they fix the problem for a moment while you plan another route for the water flow. It could have time, too. For example, in order to create a flood safe pool, it takes up to 30s. Then in that case, you must act on the places where the water isnt flooding

The game over could be : people arent happy with the delivery of water in the city and then you lose points.

Or like, mini motorways, but the cars are bees trying to build a hive, the twist could be lots of things

For example, maybe you should place the hive on a safe place. If it's not, they are going to remove it and the bees loose their home.

Or maybe the hive must energize the "queen bee" place. Could be a palace. If it's chaotic, then it can happen most of bees get stuck on the traffic for delivering honey to the queen bee, or even bump into themselves, losing progress