We've been testing the level editor and Steam Workshop support on a publicly available beta branch for the past week and have decided to move the latest build to the main branch so everyone can more easily participate in creating and playing user generated levels. From now until version 0.7 is completed and released the 'earlytests' beta and the default, non-beta build on Steam will be the same. This is not the final release of 0.7. That release will feature a new main menu and more sophisticated ways to view/download/rate/sort user created levels. In this version the current interface for choosing levels to play is temporary and basic and there may be other issues with the level editor and user levels. We have a level editor guide that we're continuing to update: http://steamcommunity.com/sharedfiles/filedetails/?id=822351096 Check out the forum discussion about the level editor here for information and if you have any questions: http://steamcommunity.com/app/337320/discussions/0/152392549353512691/ The level editor will continue to be improved and added to over time including more props, weapons, materials & characters, more logic operations and events, etc. You will also be able to update your existing levels soon. Version 0.7 will also add coop multiplayer support for all user created levels and we're aiming to have that be complete and available in early January. Expect a full changelog covering the changes from 0.6.5 to 0.7 then.