This is fun. It takes a lot of fingers, and a lot of coordination.
You need to plug the leaks before the water level gets to the top of the screen.
There are usually multiple leaks at the same time so you need to use as many fingers as it takes. Each finger can only plug one leak though – so use your fingertips.
Hold your finger on the leak until it’s repaired which takes a few seconds.
The less each leak squirts the more points you get when it’s repaired.