Cranium Conundrum (Steam key).

http://store.steampowered.com/app/527790/Cranium_Conundrum/
Cranium Conundrum is a physics-based puzzle platformer taking place in the dream worlds that you create!
Current Features:
An Extensive Level Editor with many gameplay features and physics-enabled blocks/materials
An (Early) Save/Load so you can show off your currently in-progress levels to your friends to play and enjoy or for you to finish creating at a later date.
An (Early) multiplayer enabled in the level editor for you to create and collaborate level creation with up to 8 players!
Player customization including changing character skin color (and upcoming clothings options such as head-wear and different shirts and pants)
Logic System that allows you to enable certain events and items based on triggers you place in your level!
Planned Features:
Publishing finished levels so user don´t have access to the level editor content and can only play in the play mode.
A central hub to upload your published levels filled with screenshots, comments, and ratings for you to share your awesome creative levels!
Fully realized multiplayer with different level types for multiplayer-centric levels such as Capture The Flag, Deathmatch, and Races.
A story mode where you will play through to get the backstory of the Glia and they´re purpose for creating dream worlds. It will include collectibles that you will use to either customize your player or to create in your levels.