They then stipulated that the artists had to use the Shape Editor to create all the game's assets. The final Shape editor used to develop the levels and the Shape Editor on the disc differ in that "the limits to the maximum dimensions of an individual block and the total number of blocks were removed in the PC version for prototyping." Feedback from the artists then went into refining the engine.
The results can be seen above, in this amazing video of a ship being constructed. We were excited enough when this was just a port of a free game. Now it's a completely new game, and one that looks like it absolutely should not be missed.