Monaco: What's Yours is Mine has been updated on Steam to include the Mole's Workshop level editor.
This is a free update that allows players to create their own trap-filled maps, which can then be uploaded onto the cloud via Steam Workshop. "While the level editor has been in beta, we've already received hundreds of user-generated worlds," said developer Andy Schatz in the announcement.
In other Monaco news, the Mac port just came out today on for Ł11.99 / $14.99. It too includes the level editor and comes at no extra charge to those who already own the PC version. Schatz confirmed on Twitter that "PC and Mac players can play together!"
See the Mole's Workshop in action in the video below.