Delightful little experience.  Grabbed me with it's simplicity but possibilities; kept meaning to go work on stuff but couldn't stay away until I powered thru to paradise.

  It did an effective job of implying expectations and then letting me subvert those and explore.  I spent a long time just plugging parts together on the initial screen, not wanting to caved and just follow the build guide in game.   Before completing the build, I almost accidentally explored off the first screen and had a little mind-blowing moment at all the warehouses of parts.  The design heavily implied to me that the first screen was a standalone little tutorial level for a puzzle game. =)