Precious Air

Help Valdis Barbus plug all air leaks in the tunnel and remove all shellfish from the walls.

You see, we are fulfilling our part of the agreement - maintaining the tunnel in the working state! But the walls are old, and leaks open up every now and then. And shellfish on the walls contribute to that, too. If you want to help me plug the leaks and get rid of the shellfish - you are welcome!

Make sure the tunnel is airtight!

Thanks for your help! I hope the tunnel will last long enough to ensure our victory over the strangers from the sky!