If the Black Pants guys would make a map editor, the community could spend hours on that game, creating it's own stuff. This can be hours and hours of additional gameplay. Sharing the maps on Steam Workshop or somewhere else, just like Portal 2 does. That would bring a lot of long term motivation to Tiny & Big.
Just my 2 cents.

Exactly what this fun little game needs! Great suggestion!

Yeah, this will add a lot more replay value to the game.
It's great but not sure if I will play through it twice.

The developers stated on their official forum that if people should be able to make maps, it requires a 3D modeller (I think it's Maya 6, could be wrong though) and knowledge about the special states and variables in the modeller, most likely because they use special flags and stuff on objects to enable certain in-game features (physics stuff, glow, whatever)..

I don't think there's much chance of us getting a dedicated level editor :/

Still love the game though!