The answer usually leads back to one place:

: From building competitions to community "game nights," there’s almost always something happening to keep the momentum going.

Designing "transformer" houses where walls move and floors flip at the press of a button. How to Get Involved

You can find more information and the game's community links on the official Lovely Craft Itch.io page walkthrough for a specific achievement or character unlock in the game? Lovely Craft Piston Trap Gameplay