Indie game storeFree gamesFun gamesHorror games
Game developmentAssetsComics
SalesBundles
Jobs
(+1)

"the ability to unlink slipways" 

I'm not sure about this. It would change the gameplay a lot.

(-1)

It would change the gameplay in later game yes, but that's the point, it would be a late-game purchase so you can choose to buy it and clean up and mistakes you made early-game.