In the 0.13.0 Tight spot campaign, the entire ocean is covered in walls. I'm pretty sure this was not intended, since any ocean walls you mine can't be put back for a refund.
Tight spot level 1 in 0.13:
Tight spot level 1 in 0.12:
[0.13.0] [kovarex] Tight spot walls over water
Re: [0.13.0] [kovarex] Tight spot walls over water
Thanks for the report, it is fixed for 0.13.1
It is actually caused by a bug where can_place_entity command didn't take tiles into consideration.
It is actually caused by a bug where can_place_entity command didn't take tiles into consideration.